CVE-2026-21627 SQL injection in Advanced Custom Fields
Attackers can exploit SQL injection and unauthenticated file read vulnerabilities in the Novarain/Tassos Framework plugin for Joomla via AJAX requests.
- 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-2026-21627?
CVE-2026-21627 is a critical SQL injection vulnerability in tassos.gr Advanced Custom Fields, published on 20 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The vulnerability was rooted in how the Tassos Framework plugin handled specific AJAX requests through Joomla’s com_ajax entry point. Under certain conditions, internal framework functionality could be invoked without proper restriction.
Weakness: CWE-284
Which versions are affected by CVE-2026-21627?
How do I fix CVE-2026-21627?
No fix has been published for CVE-2026-21627 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-2026-21627 being exploited?
There is no known exploitation of CVE-2026-21627 in the wild and no public exploit code.
Public exploit code: 2 proofs of concept on GitHub.
Sources
Also known as GHSA-wc6r-7g4j-c7x4.