CVE-2020-2305: Jenkins Mercurial Plugin 2.11 and earlier does not configure its XML parser to prevent XML external entity (XX

Q: How do I fix CVE-2020-2305?

mercurial: upgrade to newer than 2.11. Exact commands for each OS are on this page.

Q: Is CVE-2020-2305 being exploited?

CVE-2020-2305 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-2305 affect?

CVE-2020-2305 affects mercurial. Severity is medium (CVSS 6.5). Jenkins Mercurial Plugin 2.11 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.

Q: How urgent is CVE-2020-2305?

Priority 41/100. No elevated risk signals yet.

This month

MEDIUM 6.5UPGRADE

CVE-2020-2305 is a medium-severity flaw (CVSS 6.5) affecting mercurial. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Jenkins Mercurial Plugin 2.11 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Published	2020-11-04
Last modified	2026-06-17

Publisher (CNA): Jenkins Project · Vendor: jenkins

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-11-04 15:15 UTCPublished CVE record published
2026-06-17 03:12 UTCUpdated Record last modified

jenkins mercurial UPGRADE

Affected: <= 2.11

Fixed in: newer than 2.11

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mercurial || rpm -q mercurial || mercurial --version

2. UPGRADE to newer than 2.11 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mercurial

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mercurial

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-2305?

mercurial: upgrade to newer than 2.11. Exact commands for each OS are on this page.

Is CVE-2020-2305 being exploited?

CVE-2020-2305 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-2305 affect?

CVE-2020-2305 affects mercurial. Severity is medium (CVSS 6.5). Jenkins Mercurial Plugin 2.11 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.

How urgent is CVE-2020-2305?

Priority 41/100. No elevated risk signals yet.

Software pages

Jenkins vulnerabilities

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References

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