CVE-2026-103897 Cross-site scripting in Responsive Lightbox & Gallery
Authenticated editors can inject scripts via comment titles in the Responsive Lightbox plugin, executing code when visitors view images.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-103897?
CVE-2026-103897 is a medium-severity cross-site scripting vulnerability in dfactory Responsive Lightbox & Gallery, published on 10 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Responsive Lightbox & Gallery plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'comment' parameter in all versions up to, and including, 2.7.9 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the plugin's 'Comments' lightbox setting to be enabled (disabled by default), a moderator to approve the injected comment, and a site visitor to click the affected image to open the lightbox.
Weakness: CWE-79
Which versions are affected by CVE-2026-103897?
How do I fix CVE-2026-103897?
No fix has been published for CVE-2026-103897 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-2026-103897 being exploited?
There is no known exploitation of CVE-2026-103897 in the wild and no public exploit code.
Sources
Also known as GHSA-c385-5282-v7jj.