CVE-2025-26739
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the newseqo WordPress theme allows attackers to inject malicious scripts into web pages that are then executed when other users view those pages. It affects all WordPress sites using newseqo theme versions up to 2.1.1. Attackers can steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- WordPress newseqo theme
⚠️ 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 gain administrative access to WordPress sites, steal sensitive user data, deface websites, or distribute malware to visitors.
Likely Case
Session hijacking, credential theft, or unauthorized content modification affecting users who view compromised pages.
If Mitigated
Limited impact with proper input validation and output encoding, though stored XSS remains dangerous.
🎯 Exploit Status
Stored XSS typically requires some level of user interaction or content submission capability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 2.1.1
Restart Required: No
Instructions:
1. Update newseqo theme to latest version via WordPress admin panel. 2. Verify theme version is >2.1.1. 3. Clear any cached content.
🔧 Temporary Workarounds
Disable vulnerable theme
allSwitch to default WordPress theme until patch is applied
wp theme activate twentytwentyfour
Implement WAF rules
allAdd web application firewall rules to block XSS payloads
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers
- Disable user content submission features in theme settings
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Appearance > Themes for newseqo version ≤2.1.1Check Version:
wp theme list --field=name,status,version | grep newseqoVerify Fix Applied:
Confirm newseqo theme version >2.1.1 in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to theme endpoints
- Script tags in user-submitted content
Network Indicators:
- Malicious script payloads in HTTP requests
- Unexpected external resource loads
SIEM Query:
source="wordpress.log" AND ("newseqo" OR "theme") AND ("script" OR "onload" OR "javascript:")