CVE-2026-100751: Joomla Extension - regularlabs.com - Privileged stored XSS via data-rlta-url attributes in Tabs & Accordions (

Routine

MEDIUM 6.1UPGRADE

CVE-2026-100751 is a medium-severity flaw (CVSS 6.1) affecting tabs \& accordions. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Joomla Extension - regularlabs.com - Privileged stored XSS via data-rlta-url attributes in Tabs & Accordions (Pro) 2.3.0 - 3.1.0 - Tabs & Accordions Pro accepts a url option for an item and writes it to a generated data-rlta-url attribute. The browser code passes that value to window.open() when the item is activated. Affected versions do not reject browser URL schemes which execute JavaScript. Joomla sees ordinary plugin syntax while filtering t

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-09-28
Last modified	2026-10-27

Publisher (CNA): Joomla! Project · Vendor: regularlabs

Last updated 2026-10-27 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-28 07:17 UTCPublished CVE record published
2026-10-27 14:29 UTCUpdated Record last modified

regularlabs tabs \& accordions UPGRADE

Affected: >= 2.3.0 and <= 3.1.0

Fixed in: newer than 3.1.0

Safe to downgrade to: a release before 2.3.0

1. Check installed version

apt-cache policy tabs--accordions || rpm -q tabs--accordions || tabs--accordions --version

2. UPGRADE to newer than 3.1.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tabs--accordions

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tabs--accordions

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.3.0 (Debian / Ubuntu)

apt-cache madison tabs--accordions sudo apt install tabs--accordions=<VERSION_BEFORE_2.3.0> sudo apt-mark hold tabs--accordions

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list tabs--accordions sudo dnf downgrade tabs--accordions-<VERSION_BEFORE_2.3.0> sudo dnf versionlock add tabs--accordions

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-100751?

tabs \& accordions: upgrade to newer than 3.1.0. Exact commands for each OS are on this page.

Is CVE-2026-100751 being exploited?

CVE-2026-100751 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-100751 affect?

CVE-2026-100751 affects tabs \& accordions. Severity is medium (CVSS 6.1). Joomla Extension - regularlabs.com - Privileged stored XSS via data-rlta-url attributes in Tabs & Accordions (Pro) 2.3.0 - 3.1.0 - Tabs & Accordions Pro accepts a url option for an item and writes it to a generated data-rlta-url attribute.

How urgent is CVE-2026-100751?

Priority 27/100. No elevated risk signals yet.

Software pages

Joomla vulnerabilities

References

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