CVE-2021-21658

Jenkins Nuget Plugin 1.0 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks

published May 25, 2021

CVSS
—
EPSS
2%
Percentile
74.7
In the wild
Unconfirmed
What it is

⚠️ Watch out for sneaky XML misconfigurations! The Jenkins Nuget Plugin 1.0 and earlier has a vulnerability that could let attackers peek behind the curtain — literally! Think of it like a hotel that doesn’t verify who can access certain rooms. An attacker could sneak in through a poorly secured entrance and rummage through sensitive documents. In this case, the XML parser doesn’t check if the request is safe before fetching external resources, allowing potential data leaks! With this vulnerability, a crafty attacker could exploit the XML parser’s oversight to gain unauthorized access to sensitive data, which could lead to disastrous data leaks. If left unchecked, it’s like leaving a safe open for someone to steal valuable information!

Put simply

Think of it like a hotel that doesn’t verify who can access certain rooms. An attacker could sneak in through a poorly secured entrance and rummage through sensitive documents. In this case, the XML parser doesn’t check if the request is safe before fetching external resources, allowing potential data leaks! This vulnerability in the Jenkins Nuget Plugin stems from failure to configure the XML parser correctly, allowing XML External Entity (XXE) attacks. These attacks can be exploited to access files on the server and manipulate responses through external entities.

What to do

With this vulnerability, a crafty attacker could exploit the XML parser’s oversight to gain unauthorized access to sensitive data, which could lead to disastrous data leaks. If left unchecked, it’s like leaving a safe open for someone to steal valuable information! To secure your setup, update the Jenkins Nuget Plugin to the latest version to ensure proper XML parser configuration. Regularly review your plugins and their configurations to maintain security hygiene. Don’t forget to audit your instances for any potential misuse of XML parsing! You've got this! By following these steps, you’ll keep your Jenkins environment secure and robust! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01536 · 74.7th percentile
Published
2021-05-25T14:10Z
EPSS history
Timeline
  • 25 MAY 14:10Z
    Jenkins Nuget Plugin 1.0 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks
    cvelistv5