---
title: Jupiter X Core Twitter OAuth Callback Exploitation Attempt
id: 1a2b3c4d-5e6f-7a8b-9c0d-1e2f3a4b5c6d
status: experimental
description: Detects HTTP requests to the WordPress Twitter/X social login callback endpoint associated with CVE-2026-106013 exploitation in Jupiter X Core plugin. Repeated or anomalous requests to this endpoint may indicate authentication bypass attempts.
references:
  - https://nvd.nist.gov/vuln/detail/CVE-2026-106013
author: Security Arsenal
date: 2026/07/16
tags:
  - attack.initial_access
  - attack.t1190
logsource:
  category: webserver
  product: apache
detection:
  selection:
    cs-uri-query|contains:
      - 'oauth_verifier'
      - 'oauth_token'
    cs-uri-stem|contains:
      - 'wp-login.php'
      - 'jupiterx'
      - 'twitter'
      - 'social-login'
      - 'oauth'
      - 'callback'
  condition: selection
falsepositives:
  - Legitimate users authenticating via Twitter/X social login
  - OAuth flow from properly functioning social login integrations
level: high
---
title: WordPress Suspicious Admin Login via Social OAuth Callback
id: 2b3c4d5e-6f7a-8b9c-0d1e-2f3a4b5c6d7e
status: experimental
description: Detects POST requests to WordPress authentication endpoints with OAuth callback parameters that could indicate CVE-2026-106013 exploitation. Focuses on requests that combine OAuth token parameters with WordPress login processing.
references:
  - https://nvd.nist.gov/vuln/detail/CVE-2026-106013
author: Security Arsenal
date: 2026/07/16
tags:
  - attack.initial_access
  - attack.t1078
logsource:
  category: webserver
  product: nginx
detection:
  selection:
    request|contains:
      - 'oauth_verifier'
      - 'verify_twitter_callback'
      - 'jupiterx_core'
      - 'social_login'
      - 'twitter_callback'
  filter_method:
    method: 'POST'
  condition: selection and filter_method
falsepositives:
  - Normal social login callback processing
level: critical
---
title: Post-Exploitation WordPress Admin Account Creation
id: 3c4d5e6f-7a8b-9c0d-1e2f-3a4b5c6d7e8f
status: experimental
description: Detects creation of new WordPress user accounts via the admin-ajax.php or user-new.php endpoints shortly after OAuth callback requests, which may indicate post-exploitation persistence following CVE-2026-106013 authentication bypass.
references:
  - https://nvd.nist.gov/vuln/detail/CVE-2026-106013
author: Security Arsenal
date: 2026/07/16
tags:
  - attack.persistence
  - attack.t1136
  - attack.t1136.001
logsource:
  category: webserver
  product: apache
detection:
  selection_user_create:
    cs-uri-stem|contains:
      - '/wp-admin/user-new.php'
      - 'admin-ajax.php'
    cs-method: 'POST'
  selection_user_create_action:
    cs-body|contains:
      - 'createuser'
      - 'action=createuser'
      - 'role=administrator'
  condition: selection_user_create and selection_user_create_action
falsepositives:
  - Legitimate administrator creating new user accounts
  - Automated provisioning scripts
level: critical

// Hunt for CVE-2026-106013 exploitation attempts against WordPress Jupiter X Core
// Searches for OAuth callback requests followed by successful admin logins
let OAuthCallbackPattern = "oauth_verifier";
let TwitterLoginIndicators = dynamic(["twitter", "social_login", "jupiterx", "verify_twitter_callback", "oauth"]);
let SuspiciousRequests =
    CommonSecurityLog
    | where TimeGenerated > ago(7d)
    | where RequestURL has_any (TwitterLoginIndicators) or RequestURL contains OAuthCallbackPattern
    | where RequestMethod in ("GET", "POST")
    | extend ParsedQuery = extract_all(@"(oauth_verifier|oauth_token)=([^&]+)", RequestURL)
    | where array_length(ParsedQuery) > 0
    | summarize
        RequestCount = count(),
        UniqueDestinations = dcount(DestinationHostName),
        FirstSeen = min(TimeGenerated),
        LastSeen = max(TimeGenerated),
        RequestURLs = make_set(RequestURL, 10)
      by SourceIP, DestinationHostName, DestinationPort
    | where RequestCount > 2;
// Correlate with successful WordPress admin logins from same source IPs
SuspiciousRequests
| join kind=inner (
    CommonSecurityLog
    | where TimeGenerated > ago(7d)
    | where RequestURL contains "wp-login.php" or RequestURL contains "wp-admin"
    | where ResponseCode == 302 or ResponseCode == 200
    | summarize LoginCount = count(), LastLogin = max(TimeGenerated) by SourceIP, DestinationHostName
) on SourceIP, DestinationHostName
| project SourceIP, DestinationHostName, RequestCount, LoginCount, FirstSeen, LastSeen, RequestURLs, LastLogin
| sort by RequestCount desc

// Additional hunt: Detect post-exploitation activity on WordPress sites
// Look for plugin uploads, file modifications, or user creation from IPs
// that previously made OAuth callback requests
let SuspiciousIPs =
    CommonSecurityLog
    | where TimeGenerated > ago(7d)
    | where RequestURL contains "oauth_verifier" and RequestURL has_any ("twitter", "social", "jupiterx")
    | summarize by SourceIP;
CommonSecurityLog
| where TimeGenerated > ago(7d)
| where SourceIP in (SuspiciousIPs)
| where RequestURL has_any ("plugin-install.php", "theme-editor.php", "plugin-editor.php", "user-new.php", "update.php")
    or RequestURL contains "admin-ajax.php" and RequestURL contains "upload"
| project TimeGenerated, SourceIP, DestinationHostName, RequestURL, RequestMethod, ResponseCode
| sort by TimeGenerated desc

-- Hunt for CVE-2026-106013 exploitation indicators on WordPress servers
-- Parses Apache/Nginx access logs for Twitter OAuth callback requests
-- and identifies recently modified PHP files in WordPress directories

LET oauth_requests = SELECT
    FullPath AS LogFile,
    Line AS RawLogEntry
FROM glob(globs=[
    "/var/log/apache2/access*.log",
    "/var/log/nginx/access*.log",
    "/var/log/httpd/access*.log"
])
WHERE Line =~ 'oauth_verifier'
  AND Line =~ '(twitter|social_login|jupiterx|verify_twitter_callback)'

LET modified_wp_files = SELECT
    FullPath,
    Mtime,
    Size
FROM glob(globs=[
    "/var/www/**/wp-content/plugins/**/*.php",
    "/var/www/**/wp-content/themes/**/*.php",
    "/var/www/**/wp-admin/**/*.php",
    "/var/www/html/**/wp-content/plugins/**/*.php",
    "/var/www/html/**/wp-admin/**/*.php"
])
WHERE Mtime > now() - 86400 * 7
  AND NOT FullPath =~ 'jupiter-x-core'
  AND FullPath =~ '\.php$'
ORDER BY Mtime DESC

SELECT
    "OAuth Callback Requests" AS Category,
    count(item=oauth_requests) AS IndicatorCount
FROM scope()
UNION ALL
SELECT
    "Recently Modified WP Files (7d)" AS Category,
    count(item=modified_wp_files) AS IndicatorCount
FROM scope()

-- Detailed view: List recently modified PHP files in WordPress directories
-- that could indicate webshell deployment or file tampering post-exploitation

SELECT
    FullPath,
    Mtime,
    Ctime,
    Size,
    Mode
FROM glob(globs=[
    "/var/www/**/wp-content/uploads/**/*.php",
    "/var/www/html/**/wp-content/uploads/**/*.php",
    "/var/www/**/wp-content/plugins/**/*.php",
    "/var/www/html/**/wp-content/plugins/**/*.php"
])
WHERE Mtime > now() - 86400 * 3
  AND FullPath =~ '\.php$'
ORDER BY Mtime DESC
LIMIT 100

#!/bin/bash
# CVE-2026-106013 - Jupiter X Core Twitter OAuth Authentication Bypass
# Detection and remediation verification script
# Run with sufficient privileges to read WordPress directories

echo "============================================"
echo "CVE-2026-106013 Jupiter X Core Vulnerability"
echo "Detection & Verification Script"
echo "============================================"
echo ""

VULNERABLE_FOUND=0

# Common WordPress installation paths
WP_PATHS=(
    "/var/www/html"
    "/var/www"
    "/srv/www"
    "/home/*/public_html"
    "/home/*/www"
    "/opt/wordpress"
)

echo "[*] Scanning for Jupiter X Core plugin installations..."
echo ""

for base_path in "${WP_PATHS[@]}"; do
    # Find jupiterx-core plugin directories
    find $base_path -type d -name "jupiterx-core" -path "*/wp-content/plugins/*" 2>/dev/null | while read -r plugin_dir; do
        wp_root=$(echo "$plugin_dir" | sed 's|/wp-content/plugins/jupiterx-core||')
        echo "[FOUND] Jupiter X Core at: $plugin_dir"

        # Check plugin version from the main plugin file
        version=$(grep -m1 "Version:" "$plugin_dir/jupiterx-core.php" 2>/dev/null | awk '{print $NF}')

        if [ -z "$version" ]; then
            # Fallback: check readme.txt
            version=$(grep -m1 "Stable tag:" "$plugin_dir/readme.txt" 2>/dev/null | awk '{print $NF}')
        fi

        echo "  Version: ${version:-UNKNOWN}"

        if [ -n "$version" ]; then
            # Compare version - vulnerable if <= 4.61.0
            if printf '%s\n4.61.0\n' "$version" | sort -V | head -1 | grep -q "^4.61.0$" && [ "$version" != "4.61.1" ]; then
                major=$(echo "$version" | cut -d. -f1)
                minor=$(echo "$version" | cut -d. -f2)
                patch=$(echo "$version" | cut -d. -f3)

                if [ "$major" -lt 4 ] || \
                   { [ "$major" -eq 4 ] && [ "$minor" -lt 61 ]; } || \
                   { [ "$major" -eq 4 ] && [ "$minor" -eq 61 ] && [ "$patch" -le 0 ]; }; then
                    echo "  [!!! VULNERABLE !!!] Version $version <= 4.61.0"
                    VULNERABLE_FOUND=1
                else
                    echo "  [OK] Version $version appears patched"
                fi
            fi
        else
            echo "  [WARNING] Could not determine version - treat as potentially vulnerable"
            VULNERABLE_FOUND=1
        fi

        # Check if Twitter/X social login is configured
        echo ""
        echo "  [*] Checking for Twitter/X OAuth configuration..."

        # Look for Twitter OAuth credentials in wp-config.php and plugin settings
        twitter_keys_found=0

        if [ -f "$wp_root/wp-config.php" ]; then
            if grep -qi "twitter\|TWITTER_API\|TWITTER_CONSUMER\|OAUTH" "$wp_root/wp-config.php" 2>/dev/null; then
                echo "  [!] Potential Twitter OAuth references found in wp-config.php"
                twitter_keys_found=1
            fi
        fi

        # Check plugin option in database config references
        if grep -rqi "twitter" "$plugin_dir/includes/" 2>/dev/null | head -5; then
            echo "  [INFO] Twitter-related code found in plugin (expected)"
        fi

        # Check access logs for recent OAuth callback hits (last 24 hours)
        echo ""
        echo "  [*] Checking access logs for recent OAuth callback requests..."

        for log_dir in "/var/log/apache2" "/var/log/nginx" "/var/log/httpd"; do
            if [ -d "$log_dir" ]; then
                recent_hits=$(find "$log_dir" -name "access*" -mtime -1 -exec grep -c "oauth_verifier" {} \; 2>/dev/null | awk '{s+=$1}END{print s}')
                if [ "$recent_hits" -gt 0 ] 2>/dev/null; then
                    echo "  [!!! ALERT !!!] Found $recent_hits OAuth callback requests in last 24h logs at $log_dir"
                    echo "  [!!!] Investigate immediately for potential exploitation"
                fi
            fi
        done

        echo ""
        echo "  ----------------------------------------"
        echo ""
    done
done

echo "============================================"
echo "SCAN COMPLETE"
echo "============================================"

if [ "$VULNERABLE_FOUND" -eq 1 ]; then
    echo ""
    echo "[!!! ACTION REQUIRED !!!]"
    echo "One or more vulnerable Jupiter X Core installations detected."
    echo ""
    echo "IMMEDIATE STEPS:"
    echo "  1. Update Jupiter X Core to version 4.61.1 or later"
    echo "  2. If you cannot patch immediately, DISABLE the Twitter/X social login feature"
    echo "  3. Review WordPress admin accounts for unauthorized additions"
    echo "  4. Check wp-content/uploads/ and wp-content/plugins/ for recently modified PHP files"
    echo "  5. Review access logs for OAuth callback requests from suspicious IPs"
    echo "  6. Rotate WordPress admin passwords and OAuth application credentials"
    echo ""
else
    echo ""
    echo "[OK] No vulnerable Jupiter X Core installations detected."
    echo ""
fi

# Check for recently created admin users (requires WP-CLI)
echo "[*] Checking for WP-CLI availability to audit user accounts..."
if command -v wp &> /dev/null; then
    echo "[WP-CLI found] Listing administrator accounts created in last 7 days:"
    for base_path in "${WP_PATHS[@]}"; do
        find $base_path -name "wp-config.php" -maxdepth 3 2>/dev/null | while read -r config; do
            wp_dir=$(dirname "$config")
            echo "  Checking: $wp_dir"
            wp user list --role=administrator --path="$wp_dir" --fields=ID,user_login,user_email,user_registered --format=table 2>/dev/null
        done
    done
else
    echo "[INFO] WP-CLI not found. Manually review WordPress admin users."
    echo "  Run: wp user list --role=administrator"
fi

5. **Review WordPress activity logs.** If you have an activity log plugin (WP Activity Log, Simple History, etc.), review the period when your site was vulnerable for suspicious logins, plugin installations, theme modifications, or settings changes.

6. **Rotate credentials.** As a precautionary measure:
   - Reset passwords for all WordPress administrator accounts
   - Rotate the Twitter/X API credentials configured in Jupiter X Core (Consumer Key, Consumer Secret, Access Token, Access Token Secret)
   - Regenerate WordPress security keys and salts in `wp-config.php` (this invalidates all active sessions)

7. **Scan for webshells and file tampering.** Run a full malware scan using Wordfence, Sucuri, or a comparable solution. Pay special attention to:
   - `wp-content/uploads/` for PHP files (this directory should not contain executable PHP)
   - Recently modified files in `wp-content/plugins/` and `wp-content/themes/`
   - Any files with suspicious names (random strings, base64-encoded names, double extensions)

8. **Review OAuth application settings on Twitter/X Developer Portal.** Check the OAuth application associated with your site's social login for any unauthorized changes, additional callback URLs, or unexpected access patterns.

### Hardening Recommendations

9. **Implement a Web Application Firewall (WAF).** Solutions like Wordfence (WordPress-native), Cloudflare, or Sucuri can provide virtual patching for known WordPress plugin vulnerabilities. Configure custom rules to block requests containing `oauth_verifier` parameters to unexpected endpoints.

10. **Enable WordPress auto-updates for plugins.** Given the frequency and severity of WordPress plugin vulnerabilities, enabling automatic minor and major updates for critical plugins reduces your exposure window.

11. **Restrict WordPress admin access by IP** where operationally feasible. Use `.htaccess` rules or your WAF to limit access to `/wp-admin/` and `wp-login.php` to known IP ranges.

12. **Deploy server-side PHP execution prevention in uploads.** Add the following to `wp-content/uploads/.htaccess`:

    ```
<FilesMatch "\.php$">
    Require all denied
</FilesMatch>