CVE-2021-4416

MEDIUM

wp-mpdf <= 3.5.1 - Cross-Site Request Forgery via mpdf_admin_savepost() Function

Title source: llm

Description

The wp-mpdf plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 3.5.1. This is due to missing or incorrect nonce validation on the mpdf_admin_savepost() function. This makes it possible for unauthenticated attackers to save post data via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

References (9)

Core 9

Core References

Third Party Advisory

https://blog.nintechnet.com/25-wordpress-plugins-vulnerable-to-csrf-attacks/

Third Party Advisory

https://blog.nintechnet.com/more-wordpress-plugins-and-themes-vulnerable-to-csrf-attacks/

Third Party Advisory

https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-1/

Third Party Advisory

https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-2/

Third Party Advisory

https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-3/

Third Party Advisory

https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-4/

Third Party Advisory

https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5/

Patch

https://plugins.trac.wordpress.org/changeset/2549363/wp-mpdf/trunk/wp-mpdf.php

Third Party Advisory

https://www.wordfence.com/threat-intel/vulnerabilities/id/c47386ee-25c8-4a77-92e8-5a82afc9c826?source=cve

Scores

CVSS v3 4.3

EPSS 0.0034

EPSS Percentile 26.4%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-352

Status published

Products (2)

fkrauthan/wp-mpdf < 3.5.1

wp-mpdf_project/wp-mpdf < 3.5.1

Published Jul 12, 2023

Tracked Since Feb 18, 2026