CVE-2026-54840 WordPress Newsletters plugin <= 4.13 - Broken Access Control vulnerability
Unauthenticated attackers can bypass access controls in the Newsletters plugin, potentially accessing restricted functionality.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-54840?
CVE-2026-54840 is a high-severity missing authorization vulnerability in Tribulant Software Newsletters, published on 26 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Unauthenticated Broken Access Control in Newsletters <= 4.13 versions.
Weakness: CWE-862
Which versions are affected by CVE-2026-54840?
How do I fix CVE-2026-54840?
No fix has been published for CVE-2026-54840 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-54840 being exploited?
There is no known exploitation of CVE-2026-54840 in the wild and no public exploit code.
Sources
Also known as GHSA-7hhw-r4mw-8jm8.