CVE-2025-26538
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in the Prezi Embedder WordPress plugin allows attackers to inject malicious scripts into web pages. When users view pages containing the malicious content, their browsers execute the scripts, potentially compromising their sessions or stealing sensitive data. WordPress sites using Prezi Embedder versions up to 2.1 are affected.
💻 Affected Systems
- Prezi Embedder 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 WordPress sites, deface websites, 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, user input would be sanitized before display, preventing script execution while maintaining functionality.
🎯 Exploit Status
XSS vulnerabilities are commonly exploited, and proof-of-concept details are publicly available. Attackers need contributor-level access or higher to exploit this stored XSS.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.2 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Prezi Embedder and click 'Update Now'. 4. Alternatively, download version 2.2+ from WordPress repository and manually replace plugin files.
🔧 Temporary Workarounds
Disable Prezi Embedder Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate prezi-embedder
Restrict User Roles
allLimit contributor and author roles to trusted users only
🧯 If You Can't Patch
- Remove the Prezi Embedder plugin completely from your WordPress installation
- Implement a web application firewall (WAF) with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins for Prezi Embedder version. If version is 2.1 or earlier, you are vulnerable.Check Version:
wp plugin list --name=prezi-embedder --field=versionVerify Fix Applied:
After updating, verify Prezi Embedder shows version 2.2 or higher in WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php or admin-post.php containing script tags
- Multiple failed login attempts followed by successful contributor/author login
Network Indicators:
- Outbound connections to suspicious domains from your WordPress server
- Unusual JavaScript payloads in HTTP requests
SIEM Query:
source="wordpress.log" AND ("prezi-embedder" OR "script>" OR "javascript:") AND status=200