CVE-2026-2422 WP Composer <= 1.0.5 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'pbwp_raw_shortcode' Shortcode
Authenticated attackers can inject arbitrary scripts via Base64-encoded shortcodes, leading to script 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-2026-2422?
CVE-2026-2422 is a medium-severity cross-site scripting vulnerability in ghozylab WP Composer – The Easiest Page Builder, published on 19 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The WP Composer – The Easiest Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'pbwp_raw_shortcode' shortcode in all versions up to, and including, 1.0.5. This is due to the shortcode handler decoding Base64-encoded content and outputting it directly without any sanitization or escaping. 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. The Base64 encoding allows the payload to bypass WordPress's KSES content filtering at save time, since the encoded string contains no harmful HTML characters.
Weakness: CWE-79
Which versions are affected by CVE-2026-2422?
How do I fix CVE-2026-2422?
No fix has been published for CVE-2026-2422 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-2026-2422 being exploited?
There is no known exploitation of CVE-2026-2422 in the wild and no public exploit code.
Sources
Also known as GHSA-mpx2-87r3-w97m.