CVE-2026-65883
Unauthenticated RCE via PHP object injection in Aimy Captcha‑Less Form Guard (Joomla).
Is CVE-2026-65883 being exploited?
Not confirmed. CVE-2026-65883 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.71% probability of exploitation in the next 30 days.
How severe is CVE-2026-65883?
CVE-2026-65883 is rated Critical with a CVSS score of 10.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-65883?
Not known from our data. No patch reference has been recorded for CVE-2026-65883, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-65883 affect?
CVE-2026-65883 affects Aimy Captcha-Less Form Guard (aimy-extensions.com) Joomla extension 18.0-20.0, Joomla sites using this extension. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-65883?
Immediately patch or remove/disable the extension; isolate and audit affected hosts.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote code execution via crafted 'clfgd' field; allows arbitrary PHP execution, full site compromise and potential server takeover.
Immediate action required
- affected18.0-20.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.