9.8

CVE-2021-21696: jenkins project jenkins

CVSS: 9.8v3.1CriticalModified
AliasesGHSA-c5r9-rx53-q3gfBIT-jenkins-2021-21696
Published 04-11-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-21696 is a critical (CVSS 9.8) vulnerability in jenkins project jenkins. EPSS estimates a 2.40% chance of exploitation in the next 30 days, higher than 83.7% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
2.40%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6
RHSA-2021:4799RHSA-2021:4801RHSA-2021:4827RHSA-2021:4829RHSA-2021:4833RHSA-2022:0055

Timeline

  1. 04-11-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not limit agent read/write access to the libs/ directory inside build directories when using the FilePath APIs, allowing attackers in control of agent processes to replace the code of a trusted library with a modified variant. This results in unsandboxed code execution in the Jenkins controller process.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

2.40%

Chance of exploitation in the next 30 days

Percentile

84%

Versus all other CVEs

30-day change

0.00 pp

From 2.40% on 20-09-2026

20-09-202620-10-2026
EPSS score
2.40%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Jenkins1 product
Jenkins project1 product
  • jenkins≥ unspecified, ≤ 2.318 | ≥ unspecified, ≤ LTS 2.303.2
Org.jenkins-ci.main1 product
  • jenkins-core< 2.303.3 | ≥ 2.304, < 2.319

3 vendors · 3 products

References

5 links