CVE-2026-9239 json
Meow Gallery <= 5.5.1 - Authenticated (Author+) Stored Cross-Site Scripting via Attachment Alt Text (aria-label attribute)
published 2026-10-30 9 d ago modified 2026-10-30 9 d ago also EUVD-2026-114217
- cvss
- 6.4
- 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 25%
- public exploits
- 0
- none known
Summary
The Meow Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Attachment Alt Text (aria-label attribute) in all versions up to, and including, 5.5.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The vulnerable code path is only reachable when a gallery item is rendered as a link (i.e., link_href is non-empty), and exploitation relies on the fact that WordPress's sanitize_text_field() strips angle-bracketed tags but preserves double quotes, allowing an attacker to break out of the aria-label attribute context and inject event-handler attributes such as onclick.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 9 d ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
Affected products
- tigroumeow Meow Gallery
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/49afa739-83f0-4ad7-9e5e-d600f293b938?source=cve
- plugins.trac.wordpress.org /browser/meow-gallery/tags/5.4.9/classes/core.php#L469
- plugins.trac.wordpress.org /browser/meow-gallery/tags/5.4.9/classes/core.php#L465
- plugins.trac.wordpress.org /browser/meow-gallery/tags/5.4.9/classes/run.php#L12
- plugins.trac.wordpress.org /browser/meow-gallery/tags/5.4.5/classes/core.php#L469
- plugins.trac.wordpress.org /browser/meow-gallery/tags/5.4.5/classes/core.php#L465
- plugins.trac.wordpress.org /browser/meow-gallery/tags/5.4.5/classes/run.php#L12
- plugins.trac.wordpress.org /changeset?old_path=/meow-gallery/tags/5.5.1&new_path=/meow-gallery/tags/5.5.2
Sources
- CVE List CVE-2026-9239
- NVD CVE-2026-9239
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.