CVE-2026-66594 WordPress WordPress Persistent Login plugin <= 3.1.0 - SQL Injection vulnerability
A SQL injection vulnerability in the WordPress Persistent Login plugin allows subscribers to read or modify database contents.
- 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-2026-66594?
CVE-2026-66594 is a high-severity SQL injection vulnerability in lukeseager WordPress Persistent Login, published on 20 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Subscriber SQL Injection in WordPress Persistent Login <= 3.1.0 versions.
Weakness: CWE-89
Which versions are affected by CVE-2026-66594?
How do I fix CVE-2026-66594?
No fix has been published for CVE-2026-66594 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-66594 being exploited?
There is no known exploitation of CVE-2026-66594 in the wild and no public exploit code.
Sources
Also known as GHSA-994g-fvfg-cwf4.