CVE-2021-43559
PHP vulnerability analysis and mitigation

Overview

A vulnerability was identified in Moodle versions 3.11 to 3.11.3, 3.10 to 3.10.7, 3.9 to 3.9.10, and earlier unsupported versions. The vulnerability stems from the 'delete related badge' functionality, which lacked the necessary token check to prevent Cross-Site Request Forgery (CSRF) risks (Moodle Advisory).

Technical details

The vulnerability is classified as a Cross-Site Request Forgery (CSRF) issue with a CVSS v3.1 Base Score of 8.8 (HIGH), and vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. The vulnerability is tracked as CWE-352 (Cross-Site Request Forgery) (NVD).

Impact

The CSRF vulnerability could allow an attacker to perform unauthorized actions on behalf of authenticated users, potentially leading to high impacts on confidentiality, integrity, and availability of the system (NVD).

Mitigation and workarounds

The vulnerability has been fixed in Moodle versions 3.11.4, 3.10.8, and 3.9.11. Users are advised to upgrade to these patched versions to mitigate the risk (Moodle Advisory).

Additional resources


SourceThis report was generated using AI

Related PHP vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

GHSA-h95v-h523-3mw8MEDIUM5.9
  • PHP logoPHP
  • guzzlehttp/guzzle
NoYesJul 20, 2026
GHSA-wm3w-8rrp-j577MEDIUM5.9
  • PHP logoPHP
  • guzzlehttp/guzzle
NoYesJul 20, 2026
GHSA-f283-ghqc-fg79MEDIUM5.3
  • PHP logoPHP
  • guzzlehttp/guzzle
NoYesJul 20, 2026
GHSA-94pj-82f3-465wMEDIUM5.3
  • PHP logoPHP
  • guzzlehttp/guzzle
NoYesJul 20, 2026
CVE-2026-55219MEDIUM5.3
  • PHP logoPHP
  • paymenter/paymenter
NoYesJul 20, 2026

Free Vulnerability Assessment

Benchmark your Cloud Security Posture

Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.

Request assessment

Get a personalized demo

Ready to see Wiz in action?

"Best User Experience I have ever seen, provides full visibility to cloud workloads."
David EstlickCISO
"Wiz provides a single pane of glass to see what is going on in our cloud environments."
Adam FletcherChief Security Officer
"We know that if Wiz identifies something as critical, it actually is."
Greg PoniatowskiHead of Threat and Vulnerability Management