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CVE-2024-3961

ConvertKit <= 2.4.9 - Missing Authorization

MEDIUM
5.3
CVSS Score
Published: June 21, 2024 at 03:49 AM UTC
Updated: June 17, 2026 at 07:45 AM UTC
1 product affected across 1 vendorConvertkit Email Marketing , Email Newsletter and Landing Pages

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Convertkit Email Marketing , Email Newsletter and Landing Pages· Convertkitwordpress-plugin
95%
v ≤ 2.4.9v < 2.4.9.1
Affected range stops below 2.4.9.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Product
Source: [email protected]
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3104932%40convertkit%2Ftrunk&old=3085997%40convertkit%2Ftrunk&sfp_email=&sfph_mail=
Third Party Advisory
Source: [email protected]
https://www.wordfence.com/threat-intel/vulnerabilities/id/79d828b8-aea2-4705-ae23-ac70133a6c3e?source=cve

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMWordfence
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-862

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