CVE-2025-31873
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the SheetDB WordPress plugin allows attackers to inject malicious scripts into web pages that are then executed when other users view those pages. All WordPress sites using SheetDB versions up to 1.3.3 are affected, potentially compromising user sessions and site integrity.
💻 Affected Systems
- SheetDB WordPress Plugin
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, take over the WordPress site, deface content, or redirect users to malicious sites, potentially leading to complete site compromise and data theft.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies, perform actions on behalf of authenticated users, or display phishing content to visitors.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before execution, preventing any successful exploitation.
🎯 Exploit Status
XSS vulnerabilities are commonly exploited, and this stored XSS requires attacker to have some level of access to inject payloads.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3.4 or later
Vendor Advisory: https://patchstack.com/database/wordpress/plugin/sheetdb/vulnerability/wordpress-sheetdb-plugin-1-3-3-cross-site-scripting-xss-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find SheetDB plugin. 4. Click 'Update Now' if update available. 5. Alternatively, download latest version from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Disable SheetDB Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate sheetdb
Implement Content Security Policy
allAdd CSP headers to restrict script execution sources
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Add to wp-config.php: header("Content-Security-Policy: default-src 'self'; script-src 'self'");
🧯 If You Can't Patch
- Remove SheetDB plugin entirely if not essential
- Implement web application firewall (WAF) rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for SheetDB version. If version is 1.3.3 or earlier, you are vulnerable.Check Version:
wp plugin get sheetdb --field=versionVerify Fix Applied:
After updating, verify SheetDB plugin version shows 1.3.4 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to SheetDB endpoints containing script tags or JavaScript
- Multiple failed injection attempts in web server logs
Network Indicators:
- Outbound connections to suspicious domains from your WordPress site
- Unexpected JavaScript execution in browser developer tools
SIEM Query:
source="web_server" AND ("sheetdb" OR "SheetDB") AND ("<script" OR "javascript:" OR "onload=" OR "onerror=")