CVE-2025-8999
Sydney <= 2.56 - Missing Authorization to Authenticated (Subscriber+) Limited Theme Options Update
- State
- Published
- Severity
- 5.3 Medium
- Published
- Sep 17, 2025
- Updated
- Apr 8, 2026
- Reserved
- Aug 13, 2025
Description
The Sydney theme for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'activate_modules' function in all versions up to, and including, 2.56. This makes it possible for authenticated attackers, with Subscriber-level access and above, to activate or deactivate various theme modules.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | Wordfence |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
Sydneyathemes |
|
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/965582c6-a52e-4f88-81ef-b5dd761a0c23?source=cve
- https://themes.trac.wordpress.org/browser/sydney/2.55/inc/classes/class-sydney-modules.php#L166
- https://themes.trac.wordpress.org/browser/sydney/2.55/inc/modules/class-sydney-modules.php#L72
- https://themes.trac.wordpress.org/changeset/288374/
- https://research.cleantalk.org/cve-2025-8999/
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