CVE-2026-107756 Cross-site scripting in Meow Lightbox
Authenticated attackers can inject arbitrary scripts via comment display names when Output Buffering is enabled, leading to stored XSS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-107756?
CVE-2026-107756 is a medium-severity cross-site scripting vulnerability in tigroumeow Meow Lightbox, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Meow Lightbox plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'display_name + comment' parameter in all versions up to, and including, 5.6.2 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 vulnerability is only exploitable when the plugin's Output Buffering option is enabled (disabled by default), and requires the attacker to have at least one previously approved comment on the site so that subsequent comments are auto-approved by WordPress core.
Weakness: CWE-79
Which versions are affected by CVE-2026-107756?
How do I fix CVE-2026-107756?
No fix has been published for CVE-2026-107756 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-2026-107756 being exploited?
There is no known exploitation of CVE-2026-107756 in the wild and no public exploit code.
Sources
Also known as GHSA-6wgq-mq9p-cpvg.