Affected versions: ≥ 4.4.10 and < 4.4.16
Full advisory: www.tassos.gr
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?
CVE-2026-65758 is checked by 2 rules. Find the extension and release line your site runs:
| Extension | Affected versions | Fixed in | What to do |
|---|---|---|---|
| Convert Forms | from 4.4.10 up to but not including 4.4.16 | 4.4.16 | Update Convert Forms to 4.4.16 for this flaw, or to 5.2.5 or later, which no rule we check matches. |
| Convert Forms | from 5.0.0 up to and including 5.2.2 | update to 5.2.4 | Update Convert Forms to 5.2.4 for this flaw, or to 5.2.5 or later, which no rule we check matches. |
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 CNACVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:NHow 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
- 23 July 2026CVE-2026-65758 record published by its CNA
- 23 July 2026mySites.guru check added for Convert Forms (from 4.4.10 up to but not including 4.4.16)
- 23 July 2026mySites.guru check added for Convert Forms (from 5.0.0 up to and including 5.2.2)
Rule details
Convert Forms - Convert Forms (com_convertforms) 5.0.0 to 5.2.2 (Joomla 4/5/6 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 5.x branch, which targets Joomla 4, 5 and 6. The fix shipped in 5.2.3 on 22 July 2026; update to 5.2.4 or later, because 5.2.3 carries the fix but introduced a fatal error in the File Upload field that 5.2.4 corrects. Sites on Joomla 3 run the 4.4.x branch instead, where the same flaw was fixed in 4.4.16 - see the companion rule.
Affected versions: ≥ 5.0.0 and ≤ 5.2.2
Full advisory: www.tassos.gr
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
- CVE-2024-40744 Critical, before 4.4.10
- CVE-2024-40745 Critical, before 4.4.10
- CVE-2025-22212 Critical, before 4.4.10
- CVE-2026-77026 Medium, from 5.2.3 up to but not including 5.2.5
References
- CVE-2026-65758 on cve.org (the official CVE record)
- CVE-2026-65758 in the NIST National Vulnerability Database
- tassos.gr/releases/convert-forms/convert-forms-4-4-16
- tassos.gr/releases/convert-forms/convert-forms-5-2-3
CVE-2026-65758 questions
Which versions are affected by CVE-2026-65758?
CVE-2026-65758 is covered by 2 rules: Convert Forms from 4.4.10 up to but not including 4.4.16; Convert Forms from 5.0.0 up to and including 5.2.2.
How do I fix CVE-2026-65758?
It depends on the extension and release line your site runs. For Convert Forms from 4.4.10 up to but not including 4.4.16: update Convert Forms to 4.4.16 for this flaw, or to 5.2.5 or later, which no rule we check matches. For Convert Forms from 5.0.0 up to and including 5.2.2: update Convert Forms to 5.2.4 for this flaw, or to 5.2.5 or later, which no rule we check matches.
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?
A free audit tells you which of your Joomla and WordPress sites run an affected version, which are out of date, and which have not been backed up. No card required. If a site is already compromised, fix.mysites.guru is a single fixed fee per incident, usually resolved the same day.
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 15 November 2026.