CVE-2021-21669 XXE vulnerability in Jenkins Generic Webhook Trigger Plugin

Critical 9.8 Published 18 Jun 2021 Updated 3 Aug 2024

An attacker can exploit XML external entity vulnerabilities in the Jenkins Generic Webhook Trigger Plugin to read sensitive files or cause denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2021-21669?

CVE-2021-21669 is a critical vulnerability in Jenkins Generic Webhook Trigger Plugin, published on 18 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Jenkins Generic Webhook Trigger Plugin 1.72 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.

Which versions are affected by CVE-2021-21669?

2 open source packages ship an affected version, including org.jenkins-ci.plugins:generic-webhook-trigger. It affects 1 product.

Package	Affected	Fixed in
`org.jenkins-ci.plugins:generic-webhook-trigger` Maven	All versions	`1.74`
`org.jenkins-ci.plugins:generic-webhook-trigger` Maven	All versions	`1.74`

Products include Jenkins Generic Webhook Trigger.

How do I fix CVE-2021-21669?

Upgrade org.jenkins-ci.plugins:generic-webhook-trigger to 1.74 or later.

Is CVE-2021-21669 being exploited?

There is no known exploitation of CVE-2021-21669 in the wild and no public exploit code.

Sources

Also known as GHSA-732f-w585-gmpc.