CVE-2024-23724

Deeper analysis

Ghost through version 5.76.0 is affected by a stored cross-site scripting vulnerability tracked as CVE-2024-23724 and assigned CWE-79. The flaw resides in the handling of user profile pictures supplied in SVG format, which are persisted without sufficient sanitization and can later execute JavaScript when rendered. The CVSS 3.1 base score is 9.0, reflecting network attack vector, low complexity, and the ability to compromise confidentiality, integrity, and availability across security contexts.

An authenticated contributor account is sufficient to exploit the issue. The attacker uploads a crafted SVG containing JavaScript that reaches the Ghost administrative API listening on localhost TCP port 3001; successful execution allows the contributor to perform privileged actions that result in takeover of arbitrary user accounts, including those with administrative rights.

Public references include a detailed report and proof-of-concept from Rhino Security Labs together with Ghost pull request 19646. The vendor has stated that it does not consider the localhost API interaction a valid attack vector. The associated EPSS score rose from a low baseline to a peak of 0.4526, indicating measurable post-disclosure exploitation interest.