CVE-2026-16604 Information disclosure in Passster
Unauthenticated attackers can view password-protected content because the plugin exposes it in the HTML before verification.
- 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-2026-16604?
CVE-2026-16604 is a high-severity vulnerability in Unknown Passster, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Passster WordPress plugin before 4.3.6 outputs password-protected block content in the public page response before verifying the password, allowing unauthenticated users to recover the protected content without knowing the password.
Weakness: CWE-200
Which versions are affected by CVE-2026-16604?
How do I fix CVE-2026-16604?
No fix has been published for CVE-2026-16604 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-16604 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16604 exists.
Sources
Also known as GHSA-74rr-m8c4-9693.