CVE-2026-22421 WordPress Quantum theme <= 1.0 - Local File Inclusion vulnerability
Attackers can exploit a local file inclusion vulnerability in the Quantum WordPress theme to read sensitive files or execute arbitrary code.
- 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-2026-22421?
CVE-2026-22421 is a high-severity path traversal vulnerability in AncoraThemes Quantum, published on 5 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in AncoraThemes Quantum quantum allows PHP Local File Inclusion.This issue affects Quantum: from n/a through <= 1.0.
Weakness: CWE-98
Which versions are affected by CVE-2026-22421?
How do I fix CVE-2026-22421?
No fix has been published for CVE-2026-22421 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-22421 being exploited?
There is no known exploitation of CVE-2026-22421 in the wild and no public exploit code.
Sources
Also known as GHSA-g4cc-4vw4-wg25.