CVE-2020-2306

Missing Authorization in Jenkins Mercurial Plugin

4.3 MediumFix available

A missing permission check in Jenkins Mercurial Plugin 2.11 and earlier allows attackers with Overall/Read permission to obtain a list of names of configured Mercurial installations.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

1.10%Up 0.5 points since Apr 14, 2021

What each source reports

NVD Score used 4.3

A missing permission check in Jenkins Mercurial Plugin 2.11 and earlier allows attackers with Overall/Read permission to obtain a list of names of configured Mercurial installations.

Record: CVE-2020-2306
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS 2.0: 4.0 MediumAV:N/AC:L/Au:S/C:P/I:N/A:N
Updated: 2026-11-02

CVE List No score

A missing permission check in Jenkins Mercurial Plugin 2.11 and earlier allows attackers with Overall/Read permission to obtain a list of names of configured Mercurial installations.

Record: CVE-2020-2306
Updated: 2026-11-02

EUVDEUVD-2022-5423 No score

A missing permission check in Jenkins Mercurial Plugin 2.11 and earlier allows attackers with Overall/Read permission to obtain a list of names of configured Mercurial installations.

Record: EUVD-2022-5423
Updated: 2026-11-03

GitHub AdvisoriesGHSA-vrrc-3wwh-frgx 4.3

Missing Authorization in Jenkins Mercurial Plugin

Mercurial Plugin prior to 2.12, 2.10.1, 2.9.1, and 2.8.1 does not perform a permission check in an HTTP endpoint.

This allows attackers with Overall/Read permission to obtain a list of names of configured Mercurial installations.

Mercurial Plugin 2.12, 2.10.1, 2.9.1, and 2.8.1 performs permission checks when listing configured Mercurial installations.

Record: GHSA-vrrc-3wwh-frgx
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-862
Updated: 2026-11-02

OSV 4.3

A missing permission check in Jenkins Mercurial Plugin 2.11 and earlier allows attackers with Overall/Read permission to obtain a list of names of configured Mercurial installations.

Record: CVE-2020-2306
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

OSVGHSA-vrrc-3wwh-frgx 4.3

Missing Authorization in Jenkins Mercurial Plugin

Mercurial Plugin prior to 2.12, 2.10.1, 2.9.1, and 2.8.1 does not perform a permission check in an HTTP endpoint.

This allows attackers with Overall/Read permission to obtain a list of names of configured Mercurial installations.

Mercurial Plugin 2.12, 2.10.1, 2.9.1, and 2.8.1 performs permission checks when listing configured Mercurial installations.

Record: GHSA-vrrc-3wwh-frgx
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-862
Updated: 2026-11-02

OSVRHSA-2021:0034 6.5

Red Hat Security Advisory: OpenShift Container Platform 4.5.27 packages and security update

Record: RHSA-2021:0034
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Updated: 2026-11-02

OSVRHSA-2021:0038 7.5

Red Hat Security Advisory: OpenShift Container Platform 4.6.12 packages and security update

Record: RHSA-2021:0038
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVRHSA-2021:0637 8.0

Red Hat Security Advisory: OpenShift Container Platform 3.11.394 bug fix and security update

Record: RHSA-2021:0637
CVSS 3.1: 8.0 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`org.jenkins-ci.plugins:mercurial` Maven	2.11 to 2.11	2.12
`org.jenkins-ci.plugins:mercurial` Maven	2.10 to 2.10	2.10.1
`org.jenkins-ci.plugins:mercurial` Maven	2.9 to 2.9	2.9.1
`org.jenkins-ci.plugins:mercurial` Maven	before 2.8.1	2.8.1
`org.jenkins-ci.plugins:mercurial` Maven	2.11 up to 2.12	2.12
`org.jenkins-ci.plugins:mercurial` Maven	2.10 up to 2.10.1	2.10.1
`org.jenkins-ci.plugins:mercurial` Maven	2.9 up to 2.9.1	2.9.1
`org.jenkins-ci.plugins:mercurial` Maven	before 2.8.1, plus listed versions 1.371.381.391.401.41 Show 40 moreShow less 1.421.431.441.451.461.471.481.48-beta-11.491.501.50-beta-11.50-beta-21.50.11.511.51-beta-11.51-beta-21.51-beta-31.521.531.541.551.561.571.581.58-beta-11.591.601.612.02.0-alpha-12.0-alpha-42.0-beta-12.12.22.32.42.52.62.72.8	2.8.1
`jenkins-2-plugins` Red Hat:openshift:4.5::el7 From an advisory covering 7 CVEs	before 0:4.5.1610108899-1.el7	0:4.5.1610108899-1.el7
`python-urllib3` Red Hat:openshift:4.5::el7 From an advisory covering 7 CVEs	before 0:1.26.2-1.el7	0:1.26.2-1.el7

Show 18 moreShow less

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-2306 is a medium vulnerability (CVSS 4.3) in Jenkins Mercurial, published November 4, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.10%, the 65th percentile. Fixed in org.jenkins-ci.plugins:mercurial 2.12.

References

Show 103 moreShow less

Package	Affected	Fixed
`python2-urllib3` Red Hat:openshift:4.5::el7 From an advisory covering 7 CVEs	before 0:1.26.2-1.el7	0:1.26.2-1.el7
`jenkins-2-plugins` Red Hat:openshift:4.6::el7 From an advisory covering 7 CVEs	before 0:4.6.1608634578-1.el7	0:4.6.1608634578-1.el7
`jenkins-2-plugins` Red Hat:openshift:4.6::el8 From an advisory covering 7 CVEs	before 0:4.6.1609853716-1.el8	0:4.6.1609853716-1.el8
`openshift` Red Hat:openshift:4.6::el7 From an advisory covering 7 CVEs	before 0:4.6.0-202012190744.p0.git.94235.c62c6f7.el7	0:4.6.0-202012190744.p0.git.94235.c62c6f7.el7
`openshift-clients` Red Hat:openshift:4.6::el7 From an advisory covering 7 CVEs	before 0:4.6.0-202012172338.p0.git.3800.30af700.el7	0:4.6.0-202012172338.p0.git.3800.30af700.el7
`openshift-clients-redistributable` Red Hat:openshift:4.6::el7 From an advisory covering 7 CVEs	before 0:4.6.0-202012172338.p0.git.3800.30af700.el7	0:4.6.0-202012172338.p0.git.3800.30af700.el7
`openshift-hyperkube` Red Hat:openshift:4.6::el7 From an advisory covering 7 CVEs	before 0:4.6.0-202012190744.p0.git.94235.c62c6f7.el7	0:4.6.0-202012190744.p0.git.94235.c62c6f7.el7
`cri-o` Red Hat:openshift:4.6::el8 From an advisory covering 7 CVEs	before 0:1.19.1-2.rhaos4.6.git2af9ecf.el8	0:1.19.1-2.rhaos4.6.git2af9ecf.el8
`cri-o-debuginfo` Red Hat:openshift:4.6::el8 From an advisory covering 7 CVEs	before 0:1.19.1-2.rhaos4.6.git2af9ecf.el8	0:1.19.1-2.rhaos4.6.git2af9ecf.el8
`cri-o-debugsource` Red Hat:openshift:4.6::el8 From an advisory covering 7 CVEs	before 0:1.19.1-2.rhaos4.6.git2af9ecf.el8	0:1.19.1-2.rhaos4.6.git2af9ecf.el8
`openshift` Red Hat:openshift:4.6::el8 From an advisory covering 7 CVEs	before 0:4.6.0-202012190744.p0.git.94235.c62c6f7.el8	0:4.6.0-202012190744.p0.git.94235.c62c6f7.el8
`openshift-clients` Red Hat:openshift:4.6::el8 From an advisory covering 7 CVEs	before 0:4.6.0-202012172338.p0.git.3800.30af700.el8	0:4.6.0-202012172338.p0.git.3800.30af700.el8
`openshift-clients-redistributable` Red Hat:openshift:4.6::el8 From an advisory covering 7 CVEs	before 0:4.6.0-202012172338.p0.git.3800.30af700.el8	0:4.6.0-202012172338.p0.git.3800.30af700.el8
`openshift-hyperkube` Red Hat:openshift:4.6::el8 From an advisory covering 7 CVEs	before 0:4.6.0-202012190744.p0.git.94235.c62c6f7.el8	0:4.6.0-202012190744.p0.git.94235.c62c6f7.el8
`jenkins` Red Hat:openshift:3.11::el7 From an advisory covering 19 CVEs	before 0:2.263.3.1612433584-1.el7	0:2.263.3.1612433584-1.el7
`jenkins-2-plugins` Red Hat:openshift:3.11::el7 From an advisory covering 19 CVEs	before 0:3.11.1612862361-1.el7	0:3.11.1612862361-1.el7
`python-rsa` Red Hat:openshift:3.11::el7 From an advisory covering 19 CVEs	before 0:4.5-3.el7	0:4.5-3.el7
`python2-rsa` Red Hat:openshift:3.11::el7 From an advisory covering 19 CVEs	before 0:4.5-3.el7	0:4.5-3.el7