CVE-2025-14228
📋 TL;DR
This CVE describes a cross-site scripting (XSS) vulnerability in the Local Directory Page component of Yealink SIP-T21P E2 phones running firmware version 52.84.0.15. Attackers can inject malicious scripts that execute in users' browsers when viewing the directory page, potentially stealing session cookies or performing actions on behalf of users. Only unsupported products are affected, meaning no official patches will be released.
💻 Affected Systems
- Yealink SIP-T21P E2
⚠️ 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 control of the phone system, redirect calls, or install malware on connected systems.
Likely Case
Session hijacking, credential theft, or defacement of the directory page with malicious content.
If Mitigated
Limited impact if phones are on isolated networks with no user interaction with the directory page.
🎯 Exploit Status
Exploit details are publicly available via the provided references. Remote exploitation is possible without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None
Vendor Advisory: None
Restart Required: No
Instructions:
No official patch exists as the product is end-of-life. Consider workarounds or replacement.
🔧 Temporary Workarounds
Disable Local Directory Page
allPrevent access to the vulnerable component by disabling the Local Directory Page feature in phone configuration.
Configure via web interface: Settings > Features > Directory > Disable Local Directory
Network Segmentation
allIsolate affected phones from untrusted networks to prevent remote exploitation.
Implement firewall rules to restrict access to phone web interfaces from external networks
🧯 If You Can't Patch
- Replace affected phones with supported models that receive security updates
- Implement strict input validation and output encoding on any proxy or management systems interacting with these phones
🔍 How to Verify
Check if Vulnerable:
Check firmware version via phone web interface: Status > System Status > Firmware Version. If version is 52.84.0.15, the device is vulnerable.Check Version:
Via web interface or SSH: show versionVerify Fix Applied:
Since no patch exists, verify workarounds by confirming the Local Directory Page is inaccessible or phones are isolated.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to directory pages containing script tags or JavaScript payloads
- Multiple failed login attempts followed by directory page access
Network Indicators:
- HTTP traffic to phone web interfaces containing suspicious parameters like <script> tags
SIEM Query:
source="phone_logs" AND (uri_path="/directory" OR uri_path="/local_directory") AND (content="<script>" OR content="javascript:")