TI-2021-04695 Aliases CVE-2021-21615 GHSA-qxp6-27gw-99cj

Time-of-check time-of-use race condition in Jenkins

LOW 26CWE-367Published 2021-01-26 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: High · None · None
Fix status: Partial Red Hat: 2 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat.

Summary

Jenkins 2.275 and LTS 2.263.2 allows reading arbitrary files using the file browser for workspaces and archived artifacts due to a time-of-check to time-of-use (TOCTOU) race condition.

Why it matters now

EPSS 0.0091 60th percentileScored 2026-11-07

Fix Partial org.jenkins-ci.main:jenkins-core (Maven): 2.263.3, 2.276Red Hat: 2 advisoriesRed Hat: 2 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Jenkins	Jenkins	2.275; LTS 2.263.2	—	No fix listed	CNA
—	org.jenkins-ci.main:jenkins-core (Maven)	before 2.263.3	2.263.3	Patch available	GHSA-qxp6-27gw-99cj
—	org.jenkins-ci.main:jenkins-core (Maven)	2.264 to before 2.276	2.276	Patch available	GHSA-qxp6-27gw-99cj

Jenkins VendorJenkins Affected 2.275; LTS 2.263.2 Fixed in — No fix listed CNA
org.jenkins-ci.main:jenkins-core (Maven) Vendor— Affected before 2.263.3 Fixed in 2.263.3 Patch available GHSA-qxp6-27gw-99cj
org.jenkins-ci.main:jenkins-core (Maven) Vendor— Affected 2.264 to before 2.276 Fixed in 2.276 Patch available GHSA-qxp6-27gw-99cj

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:jenkins:jenkins:::::lts:::*	before 2.263.3	Vulnerable	Jenkins
cpe:2.3:a:jenkins:jenkins:::::-:::*	before 2.276	Vulnerable	Jenkins

cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:* Versions before 2.263.3 Vulnerable ·Jenkins
cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:* Versions before 2.276 Vulnerable ·Jenkins

Remediation

Fix · GHSA-qxp6-27gw-99cj org.jenkins-ci.main:jenkins-core (Maven) Fixed in 2.263.3 Advisory →
Fix · GHSA-qxp6-27gw-99cj org.jenkins-ci.main:jenkins-core (Maven) Fixed in 2.276 Advisory →

Red Hat 2 advisories

RHSA-2021:0429 Released 2021-03-03 · Red Hat rating Important
OpenShift Container Platform 4.5.33 packages and security update
- Red Hat OpenShift Container Platform 4.5 conmon-2:2.0.21-1.rhaos4.5.el7, conmon-2:2.0.21-1.rhaos4.5.el8, jenkins-2.263.3.1612434332-1.el7 +12
RHSA-2021:0423 Released 2021-02-17 · Red Hat rating Important
OpenShift Container Platform 4.6.17 security and packages update
- Red Hat OpenShift Container Platform 4.6 jenkins-2.263.3.1612434510-1.el8

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat OpenShift Container Platform 3.11	Affected	No fix planned: Will not fix
Red Hat OpenShift Container Platform 4.5	Fixed	RHSA-2021:0429
Red Hat OpenShift Container Platform 4.6	Fixed	RHSA-2021:0423

Not affected: 2 products

Red Hat Fuse 7
Red Hat OpenShift Container Platform 4.6

Timeline

2026-10-02 Threatist record created from CVE-2021-21615
2026-10-03 Alias added: GHSA-qxp6-27gw-99cj

References

Advisory 3

TI-2024-15885 Path traversal in Jenkins KEVCVSS 3.1CRITICAL 9.8
TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
TI-2017-14573 Jenkins versions 2.56 and earlier as well as 2.46.1 LTS and earlier are vulnerable to an… KEVCVSS 3.1CRITICAL 9.8
TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
TI-2015-04472 The Fingerprints pages in Jenkins before 1.638 and LTS before 1.625.2 might allow remote… KEVCVSS 3.1HIGH 7.5
TI-2016-07596 The remoting module in Jenkins before 2.32 and LTS before 2.19.3 allows remote attackers… CVSS 3.0CRITICAL 9.8

See all 293 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences