CVE-2026-9239mediumCWE-79

CVE-2026-9239: medium-severity vulnerability in tigroumeow Meow Gallery

Meow Gallery <= 5.5.1 - Authenticated (Author+) Stored Cross-Site Scripting via Attachment Alt Text (aria-label attribute)

Published

Follow this CVE+ Monitor Meow Gallery

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.4epss 0.3%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Affected products
tigroumeow · Meow Gallery
Related CVEs — tigroumeow Meow Gallery

In the same product, most dangerous first.

CVE-2024-4386MEDIUMGallery Block (Meow Gallery) <= 5.1.3 - Authenticated (Contributor+) Stored Cross-Site ScriptingEPSS 0.4%CVE-2026-13747MEDIUMMeow Gallery <= 5.5.4 - Missing Authorization to Authenticated (Author+) Information Disclosure via fetch_posts REST EndpointEPSS 0.4%CVE-2026-1291MEDIUMMeow Gallery <= 5.4.4 - Missing Authorization to Authenticated (Author+) Shortcode creationEPSS 0.2%