CVE-2021-24831: All AJAX actions of the Tab WordPress plugin before 1.3.2 are available to both unauthenticated and authentica

Q: How do I fix CVE-2021-24831?

tab: upgrade to 1.3.2. Exact commands for each OS are on this page.

Q: Is CVE-2021-24831 being exploited?

CVE-2021-24831 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-24831 affect?

CVE-2021-24831 affects tab. Severity is high (CVSS 7.5). All AJAX actions of the Tab WordPress plugin before 1.3.2 are available to both unauthenticated and authenticated users, allowing unauthenticated attackers to modify various data in the plugin, such as add/edit/delete arbitrary tabs.

Q: How urgent is CVE-2021-24831?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2021-24831 is a high-severity flaw (CVSS 7.5) affecting tab. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

All AJAX actions of the Tab WordPress plugin before 1.3.2 are available to both unauthenticated and authenticated users, allowing unauthenticated attackers to modify various data in the plugin, such as add/edit/delete arbitrary tabs.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-862, CWE-425
Published	2022-01-03
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: rich-web

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-01-03 13:15 UTCPublished CVE record published
2026-06-17 03:40 UTCUpdated Record last modified

rich-web tab UPGRADE

Affected: < 1.3.2

Fixed in: 1.3.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy tab || rpm -q tab || tab --version

2. UPGRADE to 1.3.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tab

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tab

Note

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

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-2021-24831?

tab: upgrade to 1.3.2. Exact commands for each OS are on this page.

Is CVE-2021-24831 being exploited?

CVE-2021-24831 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-2021-24831 affect?

CVE-2021-24831 affects tab. Severity is high (CVSS 7.5). All AJAX actions of the Tab WordPress plugin before 1.3.2 are available to both unauthenticated and authenticated users, allowing unauthenticated attackers to modify various data in the plugin, such as add/edit/delete arbitrary tabs.

How urgent is CVE-2021-24831?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

WordPress vulnerabilities

References

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