CVE-2026-54804 WordPress Melhor Envio plugin <= 2.16.3 - Broken Authentication vulnerability
An attacker can bypass authentication in the Melhor Envio WordPress plugin, potentially gaining unauthorized access to subscriber-level features.
- 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-2026-54804?
CVE-2026-54804 is a high-severity authentication bypass vulnerability in melhorenvio Melhor Envio, published on 17 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Subscriber Broken Authentication in Melhor Envio <= 2.16.3 versions.
Weakness: CWE-288
Which versions are affected by CVE-2026-54804?
How do I fix CVE-2026-54804?
No fix has been published for CVE-2026-54804 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-54804 being exploited?
There is no known exploitation of CVE-2026-54804 in the wild and no public exploit code.
Sources
Also known as GHSA-g54j-mfpf-9c6r.