CVE-2026-107323 Gallery PhotoBlocks 1.3.5 - Contributor+ Stored XSS
Contributors can inject malicious JavaScript via gallery settings, leading to code execution in admin browsers.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-107323?
CVE-2026-107323 is a medium-severity cross-site scripting vulnerability in Unknown Gallery PhotoBlocks, published on 10 Oct 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
The Gallery PhotoBlocks WordPress plugin before 1.3.6 does not sanitize and escape one of its gallery settings before outputting it into an HTML attribute, allowing users with Contributor-level access and above to store JavaScript that executes in the browser of anyone who views a page containing the gallery, including administrators.
Weakness: CWE-79
Which versions are affected by CVE-2026-107323?
How do I fix CVE-2026-107323?
No fix has been published for CVE-2026-107323 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-107323 being exploited?
There is no known exploitation of CVE-2026-107323 in the wild and no public exploit code.
Sources
Also known as GHSA-pccf-qp9v-4p26.