CVE-2021-21637

FAUCET Score

CVE-2021-21637 is a missing permission check vulnerability in Jenkins Team Foundation Server Plugin versions 5.157.1 and earlier. It allows authenticated attackers with Overall/Read permission to connect to arbitrary URLs using attacker-specified credentials, potentially exposing stored Jenkins credentials. Rated Medium severity (CVSS 6.5), this vulnerability requires low privileges and network access, leading to high confidentiality impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		<= 5.157.1CPE matchmatch criteria	cpe:2.3:a:jenkins:team_foundation_server::::::jenkins::*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

Exploitability Score

2.8

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.97%

Probability of exploitation in next 30 days

EPSS Percentile

58.3%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0097 is in the 71st percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

mavenGHSA-6364-jx4h-7564medium

Missing permission check in Jenkins Team Foundation Server Plugin allow capturing credentials

May 24, 2022

References

jenkins.io / security/advisory/2021-03-30

openwall.com / lists/oss-security/2021/03/30/1

Mailing ListThird Party Advisory