CVE-2026-122059 WP ImageViewer <= 3.0.2 - Authenticated (Subscriber+) Stored DOM-Based Cross-Site Scripting via Image 'alt' Attribute
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-122059?
CVE-2026-122059 is a medium-severity vulnerability in mpol WP ImageViewer, published on 7 Nov 2026.
Official description
The WP ImageViewer plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via the 'img.alt' parameter in all versions up to, and including, 3.0.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires a front-end content plugin such as bbPress to be active, as it grants Subscriber-level users the bbp_participant capability needed to publish image-bearing content containing the encoded payload. Exploitation by attackers with contributor-level access and above requires that the site allows Contributors (or higher) to submit image HTML in post content — the WordPress default. On a default installation, where that is not configured, the vulnerability requires attackers with custom-level access and above.
Weakness: CWE-79
Which versions are affected by CVE-2026-122059?
How do I fix CVE-2026-122059?
No fix has been published for CVE-2026-122059 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-122059 being exploited?
There is no known exploitation of CVE-2026-122059 in the wild and no public exploit code.
Sources
Also known as GHSA-jh9g-mj9g-p654.