Polylang <= 3.9.1 - Authenticated (Author+) Missing Authorization to Sticky Post Assignment via Post Translation
- ID
- WPSEC-2026-2780
- Plugin
- Polylang (polylang)
- Affected
- from 1.8 before 3.9.2
- Remediation
- Update to 3.9.2 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Weakness
- CWE-862
- Usage
- Plugin High · Affected versions High among sites WPSec scans, 2026-11-10
- Attack surface
- Polylang on WPSec AttackSurface
- Fix released
- Published
Description
The Polylang plugin for WordPress is vulnerable to unauthorized modification of data via the new post translation feature in all versions up to, and including, 3.9.1, due to a missing capability check when the sticky status of a source post is copied to a newly created translation. When a user creates a translation of a sticky post, the new post is made sticky even if the user lacks the edit_others_posts capability (WordPress requires both edit_others_posts and publish_posts to make a post sticky). This makes it possible for authenticated attackers, with author-level access and above, to publish their own posts as sticky posts, which they would not normally be allowed to do.
References
- https://wpsec.com/vuln/WPSEC-2026-2780/
- https://plugins.svn.wordpress.org/polylang/tags/3.9.2/
- https://wordpress.org/plugins/polylang/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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