Stored cross-site scripting in LikeBtn WordPress plugin
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The Like Button Rating LikeBtn plugin for WordPress is affected in all versions up to and including 2.6.64. Insufficient input sanitization and output escaping of the Client-IP header lets stored content include script (CWE-79). An unauthenticated remote attacker can inject scripts that run when a user opens an injected page, but only if the site administrator has disabled the 'Be GDPR compliant' option and an administrator takes an action.
Written with Claude Haiku 5.5 from the sources below · 2026-10-31
Description from the CNA
The Like Button Rating ♥ LikeBtn plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'HTTP_CLIENT_IP (Client-IP header)' parameter in all versions up to, and including, 2.6.64 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Successful exploitation requires the site administrator to have disabled the default 'Be GDPR compliant' option, which would otherwise hash stored IP values and neutralize the payload. Successful exploitation additionally requires an action by an administrator — the attacker cannot trigger the vulnerability on their own.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
The sources list no fixed version for Like Button Rating LikeBtn. Keep the 'Be GDPR compliant' option enabled, which hashes stored IP values and neutralizes the payload, according to the source description.
Written with Claude Haiku 5.5 from the sources below · 2026-10-31
Timeline
- 2026-10-30 Threatist record created from CVE-2026-116552
- 2026-10-30 CISA SSVC decision points changed
- 2026-10-30 Alias added: GHSA-4v84-f6r5-m2gf
References
Other 6
- https://www.wordfence.com/threat-intel/vulnerabilities/id/4816d767-89fe-403f-ac67-70235d78ce24?source=cve
- https://plugins.trac.wordpress.org/browser/likebtn-like-button/tags/2.6.64/includes/tab_votes.php#L285
- https://plugins.trac.wordpress.org/browser/likebtn-like-button/tags/2.6.64/likebtn_like_button.php#L7765
- https://plugins.trac.wordpress.org/browser/likebtn-like-button/tags/2.6.64/likebtn_like_button.php#L6968
- https://plugins.trac.wordpress.org/browser/likebtn-like-button/tags/2.6.64/likebtn_like_button.php#L6858
- https://plugins.trac.wordpress.org/changeset?reponame=&new=3773664%40likebtn-like-button%2Ftags%2F2.6.65&old=3665718%40likebtn-like-button%2Ftags%2F2.6.64
More LikeBtn vulnerabilities
- TI-2026-54457 WordPress Like Button Rating plugin <= 2.6.61 - SQL Injection vulnerability CVSS 3.1HIGH 8.5
- TI-2021-07224 Like Button Rating < 2.6.38 - Unauthorised Vote Export to Email & IP Addresses Disclosure CVSS 3.1HIGH 8.0
- TI-2024-29653 WordPress Like Button Rating LikeBtn plugin <= 2.6.53 - Reflected Cross Site Scripting (XSS) vulnerability CVSS 3.1HIGH 7.1
- TI-2022-00656 Like Button Rating < 2.6.45 - Arbitrary e-mail Sending CVSS 3.1MEDIUM 6.5
Sources
- CVE-2026-116552 · CVE Program
- CVE-2026-116552 · NVD
- FIRST EPSS
- GHSA-4v84-f6r5-m2gf · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences