What is CVE-2026-65883?

CVE-2026-65883 is a critical-severity vulnerability in Aimy-Extensions Aimy Captcha-Less Form Guard, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-07-29.

How severe is CVE-2026-65883?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2026-65883 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Deserialization in Aimy-Extensions Aimy Captcha-Less Form Guard

CVE-2026-65883

Joomla Extension - aimy-extensions.com - RCE via PHP object injection in Aimy Captcha-Less Form Guard 18.0 - 20.0 - A forged clfgd field allows PHP objection injection and thereby remote code execution.

Vulnerability class: Insecure Deserialization

EPSS: 0.007 (51.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Aimy-extensions Aimy_captcha-less_form_guard
Aimy-extensions.com Aimy Captcha-less Form Guard Plugin For Joomla — versions 18.0-20.0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

shinthink/CVE-2026-65883

References

security@joomla.org (Product, product)

Frequently asked questions

What is CVE-2026-65883?: CVE-2026-65883 is a critical-severity vulnerability in Aimy-Extensions Aimy Captcha-Less Form Guard, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-07-29.
How severe is CVE-2026-65883?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2026-65883 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.