CVE-2026-13423 Streamit <= 4.5.0 - Unauthenticated Remote Code Execution via Arbitrary Function Call
Unauthenticated attackers can execute arbitrary PHP functions via an insecure AJAX route, leading to remote code execution and privilege escalation.
- 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-2026-13423?
CVE-2026-13423 is a critical code injection vulnerability in Unknown Streamit, published on 29 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Streamit WordPress theme through 4.5.0 does not perform any authorization or nonce verification on one of its unauthenticated AJAX routes, which invokes an attacker-supplied PHP function with an attacker-supplied argument array, allowing unauthenticated attackers to call arbitrary functions (for example to create an administrator account), leading to privilege escalation and remote code execution.
Weakness: CWE-94
Which versions are affected by CVE-2026-13423?
How do I fix CVE-2026-13423?
No fix has been published for CVE-2026-13423 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-13423 being exploited?
There is no known exploitation of CVE-2026-13423 in the wild and no public exploit code.
Sources
Also known as GHSA-fvvp-v9c4-343h.