Is CVE-2021-24537 actively exploited?

No active exploitation of CVE-2021-24537 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-24537 be exploited remotely?

Yes. CVE-2021-24537 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-24537?

CVE-2021-24537 has a CVSS score of 7.2 (HIGH).

HOME VULNERABILITIESCVE-2021-24537

HIGH

CVE-2021-24537

CWE-94Published: November 8, 2021· Updated: Jun 17, 2026

7.2

CVSS v3.1

Official Description

The Similar Posts WordPress plugin through 3.1.5 allow high privilege users to execute arbitrary PHP code in an hardened environment (ie with DISALLOW_FILE_EDIT, DISALLOW_FILE_MODS and DISALLOW_UNFILTERED_HTML set to true) via the 'widget_rrm_similar_posts_condition' widget setting of the plugin.

NVD Source

Technical Analysis

CVE-2021-24537 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.2.