CVE-2021-4403

MEDIUM

Remove Schema < 1.5 - Cross-Site Request Forgery via Missing Nonce Validation

Title source: llm

Description

The Remove Schema plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.5. This is due to missing or incorrect nonce validation on the validate() function. This makes it possible for unauthenticated attackers to modify the plugins settings 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

Not Applicable

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

Not Applicable

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

Not Applicable

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

Not Applicable

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/

Not Applicable

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

Not Applicable

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

Patch

https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2548575%40remove-schema&new=2548575%40remove-schema&sfp_email=&sfph_mail=

Third Party Advisory

https://www.wordfence.com/threat-intel/vulnerabilities/id/89635463-966d-4f7d-995d-ad83a502d95b?source=cve

Scores

CVSS v3 4.3

EPSS 0.0039

EPSS Percentile 31.3%

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)

timvaniersel/Remove Schema < 1.5

websitescanner/remove_schema < 1.5

Published Jul 01, 2023

Tracked Since Feb 18, 2026