How severe is CVE-2021-24537?

CVE-2021-24537 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-24537 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24537?

CVE-2021-24537 affects Shareaholic Similar Posts. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24537?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-24537 published?

CVE-2021-24537 was published on 2021-11-08 and last updated on 2026-06-17.

CVE-2021-24537

CVE-2021-24537 is a high-severity vulnerability in Shareaholic Similar Posts with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.0
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Shareaholic Similar Posts
Published: 2021-11-08
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-24537?: 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.
How severe is CVE-2021-24537?: CVE-2021-24537 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-24537 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24537?: CVE-2021-24537 affects Shareaholic Similar Posts. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24537?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-24537 published?: CVE-2021-24537 was published on 2021-11-08 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/0d6b46cb-5244-486f-ad70-4023907ac9eb

Affected products (1)

cpe:2.3:a:shareaholic:similar_posts:*:*:*:*:*:wordpress:*:*

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