Affected versions: ≥ 2.3.0 and < 3.2.0
Full advisory: our disclosure post
CVE-2026-100751HighCVSS 7.5Published 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.
Affected versions: ≥ 2.3.0 and < 3.2.0
Official record: cve.org · NVD
Every connected Joomla site is checked against these rules on each audit, and flagged if it runs an affected version.
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 CNACVSS: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:NHow 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
Affected extensions and versions
Tabs & Accordions - 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.
Affected versions: ≥ 2.3.0 and < 3.2.0
Full advisory: our disclosure post
Tabs & Accordions - 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.
Affected versions: ≥ 2.3.0 and < 3.2.0
Full advisory: our disclosure post
Our disclosure post
Running an affected version on a site you manage?
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Rules current as of 3 October 2026.