CVE-2026-6641 Cross-site scripting in Media Library Assistant
Authenticated attackers can inject arbitrary scripts via the mla_link_href shortcode parameter, leading to stored XSS execution on victim pages.
- 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-2026-6641?
CVE-2026-6641 is a medium-severity cross-site scripting vulnerability in dglingren Media Library Assistant, published on 11 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Media Library Assistant plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'mla_gallery' shortcode in versions up to and including 3.35. This is due to insufficient input sanitization and output escaping on the mla_link_href parameter when mla_output is set to 'paginate_links', where the _paginate_links() function processes the value through mla_process_shortcode_parameter() and _replace_query_parameter() without proper URL escaping, then outputs it directly in href attributes without applying esc_url(). This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Weakness: CWE-79
Which versions are affected by CVE-2026-6641?
How do I fix CVE-2026-6641?
No fix has been published for CVE-2026-6641 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-2026-6641 being exploited?
There is no known exploitation of CVE-2026-6641 in the wild and no public exploit code.
Sources
Also known as GHSA-928c-4p6w-v8h4.