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Kunena security vulnerabilities

mySites.guru tracks 2 vulnerabilities in Kunena (com_kunena). Every connected Joomla site is checked against them on each audit.

Is my site affected?

Your site is affected if it runs Kunena in any of these ranges:

  • from 7.0.0 up to but not including 7.1.1
  • from 6.0.0 up to but not including 6.4.17
Latest safe version
7.1.1 or later. No rule we check matches that release or any newer one.
What to do
Update Kunena to 7.1.1 or later from the vendor, then confirm the installed version on the Joomla administrator's Extensions: Manage screen.
Check whether your sites are affected

Every Kunena vulnerability we track

Newest first. CVSS is the score published in each CVE record, where it has one; the severity column is the rating our check uses.

CVEAffected versionsFixed inSeverityAdded
No CVE idfrom 7.0.0 up to but not including 7.1.17.1.1Medium2026-11-10
No CVE idfrom 6.0.0 up to but not including 6.4.176.4.17Medium2026-11-10

What we check for

Medium2026-11-10

Kunena (com_kunena) below 7.1.1 and 6.4.17 - Stored XSS and Missing Authorisation Checks

Kunena 7.1.1 and 6.4.17 (10 November 2026) are security releases. Both fix stored cross-site scripting in forum posts (the [video] BBCode, SoundCloud and Instagram auto-embeds, and attachment filenames), which any member who can post can use to run script in the browser of everyone who reads the topic, including administrators, and an attachment upload that skipped the category permission check. Kunena 7.1.1 also fixes a banned-user list any visitor could open, subscription and favourite lists that let anyone read and remove another member's subscriptions, an avatar gallery path traversal, unbounded topic ratings, and further XSS in mentions, the activity stream and the moderator IP link. No CVE has been published. Kunena 7.0.x has no fixed release on its own line: update to Kunena 7.1.1 (Joomla 5.4 or 6.x, PHP 8.3+).

Affected versions: ≥ 7.0.0 and < 7.1.1

Full advisory: our disclosure post

Medium2026-11-10

Kunena (com_kunena) below 7.1.1 and 6.4.17 - Stored XSS and Missing Authorisation Checks

Kunena 6.4.17 and 7.1.1 (10 November 2026) are security releases. Both fix stored cross-site scripting in forum posts (the [video] BBCode, SoundCloud and Instagram auto-embeds, and attachment filenames), which any member who can post can use to run script in the browser of everyone who reads the topic, including administrators, and an attachment upload that skipped the category permission check. Kunena 6.4.17 does not include the further access-control fixes in 7.1.1 (banned-user list, member subscriptions and favourites, topic ratings). No CVE has been published. Update to 6.4.17 now, and plan the move to Kunena 7.1.1 (Joomla 5.4 or 6.x): Kunena 6.4 security support ends in December 2026. Kunena 6.0 to 6.3 have no fix on their own lines.

Affected versions: ≥ 6.0.0 and < 6.4.17

Full advisory: our disclosure post

Timeline

  1. 10 November 2026Check added for a flaw with no CVE id (from 7.0.0 up to but not including 7.1.1)
  2. 10 November 2026Check added for a flaw with no CVE id (from 6.0.0 up to but not including 6.4.17)
  3. 10 November 2026We published: Kunena 7.1.1 and 6.4.17 Fix Stored XSS and Open Member Data in the Joomla Forum Extension

What we have written about Kunena

Kunena 7.1.1 and 6.4.17 Fix Stored XSS and Open Member Data in the Joomla Forum Extension

Kunena 7.1.1 and 6.4.17 Fix Stored XSS and Open Member Data in the Joomla Forum Extension

Kunena 7.1.1 and 6.4.17 are security releases for the Joomla forum extension. Both fix stored XSS in posts, and only 7.1.1 closes open member data lists.

References

Kunena vulnerability questions

Which versions of Kunena are vulnerable?
mySites.guru tracks 2 vulnerabilities in Kunena (com_kunena). A site is affected if its installed version is in any of these ranges: from 7.0.0 up to but not including 7.1.1; from 6.0.0 up to but not including 6.4.17.
What is the latest safe version of Kunena?
7.1.1. Every vulnerability tracked here is fixed by 7.1.1, and no rule we check matches that release or any later one.
How do I check which version of Kunena my Joomla site runs?
The installed version is listed on the Joomla administrator's Extensions: Manage screen; search it for com_kunena. mySites.guru reads the installed version on every audit of a connected site and checks it against these rules.

Running Kunena 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 10 November 2026.