CVE-2023-25765 Sandbox escape in Jenkins Email Extension Plugin

What is CVE-2023-25765?

CVE-2023-25765 is a critical code injection vulnerability in Jenkins Email Extension Plugin, published on 15 Feb 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

In Jenkins Email Extension Plugin 2.93 and earlier, templates defined inside a folder were not subject to Script Security protection, allowing attackers able to define email templates in folders to bypass the sandbox protection and execute arbitrary code in the context of the Jenkins controller JVM.

Weakness: CWE-693

Which versions are affected by CVE-2023-25765?

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

Products include Jenkins Email Extension.

How do I fix CVE-2023-25765?

Upgrade org.jenkins-ci.plugins:email-ext to 2.94 or later.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2023-25765 being exploited?

There is no known exploitation of CVE-2023-25765 in the wild and no public exploit code.

Other vulnerabilities in Jenkins Email Extension Plugin

• CVE-2019-1003032 Script security sandbox bypass in Jenkins Email Extension Plugin Critical 9.9
• CVE-2026-48920 Jenkins Email Extension Plugin: Attackers able to control email content may specify `file:` URLs for images to read arbitrary files from Jenkins controller filesystem High 8.8
• CVE-2020-2232 Jenkins Email Extension Plugin SMTP password transmitted and displayed in plain text High 7.5
• CVE-2018-1000176 Jenkins Email Extension Plugin showed plain text SMTP password in configuration form field Medium 6.5
• CVE-2023-25763 Cross-site Scripting in Jenkins Email Extension Plugin Medium 5.4

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-c9c2-wcxh-3w5j.