Description
The Old Posts Highlighter plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 1.0.3. This is due to missing or incorrect nonce validation on the OPH_options function. This makes it possible for unauthenticated attackers to update the plugin's configuration settings without authorization via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
Metrics
CVSS 3.1 4.3/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| mkhfr | Old Posts Highlighter | <= 1.0.3 |
References
- https://plugins.trac.wordpress.org/browser/old-posts-highlighter/tags/1.0.3/OPH_admin.php#L163
- https://plugins.trac.wordpress.org/browser/old-posts-highlighter/tags/1.0.3/OPH_admin.php#L37
- https://plugins.trac.wordpress.org/browser/old-posts-highlighter/trunk/OPH_admin.php#L163
- https://plugins.trac.wordpress.org/browser/old-posts-highlighter/trunk/OPH_admin.php#L37
- https://www.wordfence.com/threat-intel/vulnerabilities/id/c186d5eb-abc2-47bd-9d3c-2b2f24d2f87e?source=cve
Timeline
- Published
- May 27, 2026
- Last modified
- Jun 17, 2026
- NVD status
- Deferred