CVE-2021-24211: The WordPress Related Posts plugin through 3.6.4 contains an authenticated (admin+) stored XSS vulnerability i

Q: How do I fix CVE-2021-24211?

wordpress related posts: upgrade to newer than 3.6.4. Exact commands for each OS are on this page.

Q: Is CVE-2021-24211 being exploited?

CVE-2021-24211 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-2021-24211 affect?

CVE-2021-24211 affects wordpress related posts. Severity is medium (CVSS 5.4). The WordPress Related Posts plugin through 3.6.4 contains an authenticated (admin+) stored XSS vulnerability in the title field on the settings page. By exploiting that an attacker will be able to execute JavaScript code in the user's brows

Q: How urgent is CVE-2021-24211?

Priority 36/100. Public exploit reference

Routine

MEDIUM 5.4UPGRADE

CVE-2021-24211 is a medium-severity flaw (CVSS 5.4) affecting wordpress related posts. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The WordPress Related Posts plugin through 3.6.4 contains an authenticated (admin+) stored XSS vulnerability in the title field on the settings page. By exploiting that an attacker will be able to execute JavaScript code in the user's browser.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-04-05
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: sovrn

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

Am I affected?

Timeline

2021-04-05 19:15 UTCPublished CVE record published
2026-06-17 03:39 UTCUpdated Record last modified

sovrn wordpress related posts UPGRADE

Affected: <= 3.6.4

Fixed in: newer than 3.6.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy wordpress-related-posts || rpm -q wordpress-related-posts || wordpress-related-posts --version

2. UPGRADE to newer than 3.6.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade wordpress-related-posts

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wordpress-related-posts

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-2021-24211?

wordpress related posts: upgrade to newer than 3.6.4. Exact commands for each OS are on this page.

Is CVE-2021-24211 being exploited?

CVE-2021-24211 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-2021-24211 affect?

CVE-2021-24211 affects wordpress related posts. Severity is medium (CVSS 5.4). The WordPress Related Posts plugin through 3.6.4 contains an authenticated (admin+) stored XSS vulnerability in the title field on the settings page. By exploiting that an attacker will be able to execute JavaScript code in the user's brows

How urgent is CVE-2021-24211?

Priority 36/100. Public exploit reference

Software pages

WordPress vulnerabilities

References

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