CVE-2024-9021: In the process of testing the Relevanssi WordPress plugin before 4.23.1, a vulnerability was found that allow

Q: How do I fix CVE-2024-9021?

relevanssi: upgrade to 4.23.1. Exact commands for each OS are on this page.

Q: Is CVE-2024-9021 being exploited?

CVE-2024-9021 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-2024-9021 affect?

CVE-2024-9021 affects relevanssi. Severity is medium (CVSS 5.4). In the process of testing the Relevanssi WordPress plugin before 4.23.1, a vulnerability was found that allows you to implement Stored XSS on behalf of the Contributor+ by embedding malicious script, which entails account takeover backdoor

Q: How urgent is CVE-2024-9021?

Priority 34/100. Public exploit reference

Routine

MEDIUM 5.4UPGRADE

CVE-2024-9021 is a medium-severity flaw (CVSS 5.4) affecting relevanssi. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In the process of testing the Relevanssi WordPress plugin before 4.23.1, a vulnerability was found that allows you to implement Stored XSS on behalf of the Contributor+ by embedding malicious script, which entails account takeover backdoor

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	0.5% (top 61%)
CISA exploited list	No
Weakness	CWE-79
Published	2024-10-08
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: relevanssi

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

Am I affected?

Timeline

2024-10-08 06:15 UTCPublished CVE record published
2026-06-17 08:23 UTCUpdated Record last modified

relevanssi relevanssi UPGRADE

Affected: < 4.23.1

Fixed in: 4.23.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 4.23.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade relevanssi

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-2024-9021?

relevanssi: upgrade to 4.23.1. Exact commands for each OS are on this page.

Is CVE-2024-9021 being exploited?

CVE-2024-9021 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-2024-9021 affect?

CVE-2024-9021 affects relevanssi. Severity is medium (CVSS 5.4). In the process of testing the Relevanssi WordPress plugin before 4.23.1, a vulnerability was found that allows you to implement Stored XSS on behalf of the Contributor+ by embedding malicious script, which entails account takeover backdoor

How urgent is CVE-2024-9021?

Priority 34/100. Public exploit reference

Software pages

WordPress vulnerabilities

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References

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