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CVE-2026-65758HighCVSS 8.2CVE published 23 July 2026Added to mySites.guru 23 July 2026

Convert Forms (com_convertforms) 4.4.10 to 4.4.15 (Joomla 3 branch) - Unauthenticated Submission Disclosure

Tracked as CVE-2026-65758 (Joomla CNA, published 23 July 2026, CVSS 4.0 8.2 High, CWE-200/CWE-284). Convert Forms by Tassos did not enforce access control on the front-end Submissions view, so an unauthenticated visitor could list the submissions sent through a form - exposing whatever that form collects, typically names, email addresses and message bodies. Tassos fixed the flaw separately on each release branch. This rule covers the Joomla 3 branch: 4.4.11 through 4.4.16 are Joomla 3.8/3.9/3.10 only builds, and the fix shipped in 4.4.16 on 27 July 2026. Update to Convert Forms 4.4.16. The floor is 4.4.10 because everything below it is flagged by the separate Convert Forms rule. Sites on Joomla 4, 5 or 6 run the 5.x branch instead, where the same flaw was fixed in 5.2.3 - see the companion rule.

Is my site affected?

Affected
Convert Forms from 4.4.10 up to but not including 4.4.16
Fixed in
4.4.16
What to do
Update Convert Forms to 4.4.16 for this flaw, or to 5.2.5 or later, which no rule we check matches.
Check whether your sites are affected

How CVE-2026-65758 is scored

The base metrics as Joomla CNA published them, and what each one means for a site running an affected version. Threat and environmental metrics are left out: they describe a moment or a particular install rather than the flaw.

8.2 High

CVSS 4.0, scored by Joomla CNA
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

How it is reached

AV:N Attack vector
Network. Reachable across the internet
AC:H Attack complexity
High. The attacker has to defeat a mitigation first
AT:P Attack requirements
Present. Needs a particular deployment or race to line up
PR:N Privileges required
None. No account needed
UI:N User interaction
None. Nobody has to be tricked into anything

What it does to the site

VC:H Confidentiality
High. Everything the site holds can be read
VI:N Integrity
None. Nothing can be altered
VA:N Availability
None. The site stays up

What it does beyond the site

SC:N Confidentiality
None. Other systems keep their data
SI:N Integrity
None. Other systems keep their integrity
SA:N Availability
None. Other systems stay up

Timeline

  1. 23 July 2026CVE-2026-65758 record published by its CNA
  2. 23 July 2026mySites.guru check added for Convert Forms (from 4.4.10 up to but not including 4.4.16)

Rule details

Other vulnerabilities in Convert Forms

Updating for CVE-2026-65758 alone can leave a site on a release another rule still matches. These are the other flaws we check for in the same extension.

Convert Forms

Latest safe version: 5.2.5

References

CVE-2026-65758 questions

Which versions are affected by CVE-2026-65758?
CVE-2026-65758 affects Convert Forms from 4.4.10 up to but not including 4.4.16. The fix is in 4.4.16.
How do I fix CVE-2026-65758?
Update Convert Forms to 4.4.16 for this flaw, or to 5.2.5 or later, which no rule we check matches. Then confirm the installed version on the Joomla administrator's Extensions: Manage screen.
How severe is CVE-2026-65758?
Joomla CNA scores it 8.2 (High) under CVSS 4.0. In plain terms: reachable across the internet, no account needed and nobody has to be tricked into anything.

Running an affected version on a site you manage?

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This check is part of the mySites.guru Joomla vulnerability scanner, which reads every installed extension's version on each audit. Browse the rest of the Joomla vulnerability database.

Rules current as of 5 October 2026.