Is CVE-2024-3961 in the CISA KEV catalog?

No. CVE-2024-3961 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-3961?

CVE-2024-3961 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2024-3961?

CVE-2024-3961 has an EPSS score of 0.37% (29th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2024-3961

Q: How do I fix CVE-2024-3961?

Upgrade convertkit - email marketing\, email newsletter and landing pages to 2.4.9.1 or later.

MEDIUM

5.3

CVSS v3

NVD

Description

The ConvertKit – Email Newsletter, Email Marketing, Subscribers and Landing Pages plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the tag_subscriber function in all versions up to, and including, 2.4.9. This makes it possible for unauthenticated attackers to subscribe users to tags. Financial damages may occur to site owners if their API quota is exceeded.

CWE-862Missing Authorization

How to fix

Remediation Available

convertkit - email marketing\, email newsletter and landing pagesNVD

Affected:< 2.4.9.1Fixed in:2.4.9.1CVE-2024-3961derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Exploit Intelligence

0.37%probability of exploitation in 30 days

29thpercentile

Low risk: more likely to be exploited than 29% of all known CVEs.

References

Third-Party Advisory1

wordfence.com

Product1

plugins.trac.wordpress.org

Related Vulnerabilities

Other CWE-862 (Missing Authorization) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-39226	Critical	9.8	100%	KEV	Fix
CVE-2022-0543	Critical	10.0	100%	KEV	Fix
CVE-2021-21978	Critical	9.8	99%	-	Fix
CVE-2023-52163	High	8.8	96%	KEV	-
CVE-2022-1329	High	8.8	93%	-	-
CVE-2023-6875	Critical	9.8	90%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-08.