CVE-2026-5306 Check & Log Email < 2.0.13 - Unauthenticated Stored XSS
Unauthenticated attackers can inject malicious scripts via email replacement when the email encoder setting is enabled in the Check & Log Email plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-5306?
CVE-2026-5306 is a medium-severity cross-site scripting vulnerability in Unknown Check & Log Email, published on 28 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
The Check & Log Email WordPress plugin before 2.0.13 does not properly handle email replacement, which could allow unauthenticated users to perform Stored XSS attacks when the email encoder setting is enabled
Which versions are affected by CVE-2026-5306?
How do I fix CVE-2026-5306?
No fix has been published for CVE-2026-5306 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-2026-5306 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5306 exists.
Sources
Also known as GHSA-p8g5-jxr9-99q9.