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CVE-2026-100751HighCVSS 7.5CVE published 28 September 2026Added to mySites.guru 27 September 2026

Tabs & Accordions (tabsaccordions) 2.3.0 to below 3.2.0 - Authenticated Stored XSS via JavaScript URLs in data-rlta-url Attributes

Regular Labs Tabs & Accordions 3.0.0 through 3.1.x is affected by a security issue fixed in 3.2.0 (released 27 September 2026). data-rlta-url attributes accepted executable JavaScript URLs, so script supplied by a content author ran in the browser of a visitor who used the tab or accordion. Exploitation requires the ability to author or edit content, so this is an authenticated stored XSS. The vendor tags the fix PRO, so Free installs on the same version numbers are unlikely to be affected, but mySites.guru cannot tell the two editions apart by version number and flags both. Update to 3.2.0 or later. This is a separate issue from the data-rlta-alias XSS fixed in 3.1.0, so sites that updated to 3.1.0 on 13 September need to update again. No CVE record for this fix has been published yet.

Is my site affected?

Affected
Tabs & Accordions from 2.3.0 up to but not including 3.2.0
Fixed in
3.2.0
What to do
Update Tabs & Accordions to 3.2.0 or later.
Check whether your sites are affected

How CVE-2026-100751 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.

7.5 High

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

How it is reached

AV:N Attack vector
Network. Reachable across the internet
AC:L Attack complexity
Low. Nothing to work around, it just works
AT:P Attack requirements
Present. Needs a particular deployment or race to line up
PR:H Privileges required
High. Needs an account with elevated rights
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:H Integrity
High. Data and files can be altered at will
VA:L Availability
Low. The site slows or stutters

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. 27 September 2026mySites.guru check added for Tabs & Accordions (from 2.3.0 up to but not including 3.2.0)
  2. 27 September 2026We published: Modules Anywhere 10.0.0 and Tabs & Accordions 3.2.0 Close Two Content Author Security Holes
  3. 28 September 2026CVE-2026-100751 record published by its CNA

Rule details

Our disclosure post

Modules Anywhere 10.0.0 and Tabs & Accordions 3.2.0 Close Two Content Author Security Holes

Modules Anywhere 10.0.0 and Tabs & Accordions 3.2.0 Close Two Content Author Security Holes

CVE-2026-100750 and CVE-2026-100751: Regular Labs fixed two High severity issues in Modules Anywhere 10.0.0 and Tabs & Accordions 3.2.0 for Joomla.

Other vulnerabilities in Tabs & Accordions and Tabs & Accordions

Updating for CVE-2026-100751 alone can leave a site on a release another rule still matches. These are the other flaws we check for in the same extensions.

Tabs & Accordions

Latest safe version: 3.2.0

Tabs & Accordions

Latest safe version: 3.2.0

References

CVE-2026-100751 questions

Which versions are affected by CVE-2026-100751?
CVE-2026-100751 affects Tabs & Accordions from 2.3.0 up to but not including 3.2.0. The fix is in 3.2.0.
How do I fix CVE-2026-100751?
Update Tabs & Accordions to 3.2.0 or later. Then confirm the installed version on the Joomla administrator's Extensions: Manage screen.
How severe is CVE-2026-100751?
Joomla CNA scores it 7.5 (High) under CVSS 4.0. In plain terms: reachable across the internet, needs an account with elevated rights 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 13 October 2026.