CVE-2026-8896 MIR blocks and shortcodes <= 1.0.0 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode Attributes
Authenticated contributors can inject arbitrary scripts via shortcode attributes, 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-2026-8896?
CVE-2026-8896 is a medium-severity cross-site scripting vulnerability in mirsoftware MIR blocks and shortcodes, published on 24 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The MIR blocks and shortcodes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'title' attribute (and other attributes such as 'ready_animation_text') of the 'msc_stats' shortcode in versions up to, and including, 1.0.0. This is due to insufficient input sanitization and output escaping on user supplied shortcode attributes inside the msc_stats() rendering function. 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-2026-8896?
How do I fix CVE-2026-8896?
No fix has been published for CVE-2026-8896 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-2026-8896 being exploited?
There is no known exploitation of CVE-2026-8896 in the wild and no public exploit code.
Sources
Also known as GHSA-c2xc-5vpx-hhx9.