CVE-2025-8999 json
Sydney <= 2.56 - Missing Authorization to Authenticated (Subscriber+) Limited Theme Options Update
published 2025-09-17 13 mo ago modified 2026-09-26 44 d ago also EUVD-2025-29712
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 20%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 13 mo ago
Exploit prediction
0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected products
- athemes Sydney
Classification
- Weakness
-
- CWE-862 Missing Authorization
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/965582c6-a52e-4f88-81ef-b5dd761a0c23?source=cve
- themes.trac.wordpress.org /browser/sydney/2.55/inc/classes/class-sydney-modules.php#L166
- themes.trac.wordpress.org /browser/sydney/2.55/inc/modules/class-sydney-modules.php#L72
- themes.trac.wordpress.org /changeset/288374/
- research.cleantalk.org /cve-2025-8999/
Sources
- CVE List CVE-2025-8999
- NVD CVE-2025-8999
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