CVE-2026-1661 WP Mail Logging < 1.17.0 - Unauthenticated HTML Injection
Unauthenticated attackers can inject HTML into email logs to deceive administrators and redirect them to malicious sites.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-1661?
CVE-2026-1661 is a medium-severity cross-site scripting vulnerability in Unknown WP Mail Logging, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The WP Mail Logging WordPress plugin before 1.17.0 does not properly restrict the HTML and CSS of logged emails before rendering them in its admin log screens, allowing unauthenticated users to inject styled content and links, for example through a public contact form, that can deceive an administrator viewing the log and send their browser to an attacker-controlled page.
Weakness: CWE-79
Which versions are affected by CVE-2026-1661?
How do I fix CVE-2026-1661?
No fix has been published for CVE-2026-1661 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-2026-1661 being exploited?
There is no known exploitation of CVE-2026-1661 in the wild and no public exploit code.
Sources
Also known as GHSA-3mmj-c498-mq95.