CVE-2021-21655: A cross-site request forgery (CSRF) vulnerability in Jenkins P4 Plugin 1.11.4 and earlier allows attackers to

Q: How do I fix CVE-2021-21655?

p4: upgrade to newer than 1.11.4. Exact commands for each OS are on this page.

Q: Is CVE-2021-21655 being exploited?

CVE-2021-21655 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-2021-21655 affect?

CVE-2021-21655 affects p4. Severity is high (CVSS 7.1). A cross-site request forgery (CSRF) vulnerability in Jenkins P4 Plugin 1.11.4 and earlier allows attackers to connect to an attacker-specified Perforce server using attacker-specified username and password.

Routine

HIGH 7.1UPGRADE

CVE-2021-21655 is a high-severity flaw (CVSS 7.1) affecting p4. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A cross-site request forgery (CSRF) vulnerability in Jenkins P4 Plugin 1.11.4 and earlier allows attackers to connect to an attacker-specified Perforce server using attacker-specified username and password.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-352
Published	2021-05-11
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

2021-05-11 15:15 UTCPublished CVE record published
2026-06-17 03:35 UTCUpdated Record last modified

jenkins p4 UPGRADE

Affected: <= 1.11.4

Fixed in: newer than 1.11.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy p4 || rpm -q p4 || p4 --version

2. UPGRADE to newer than 1.11.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade p4

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade p4

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-2021-21655?

p4: upgrade to newer than 1.11.4. Exact commands for each OS are on this page.

Is CVE-2021-21655 being exploited?

CVE-2021-21655 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-2021-21655 affect?

CVE-2021-21655 affects p4. Severity is high (CVSS 7.1). A cross-site request forgery (CSRF) vulnerability in Jenkins P4 Plugin 1.11.4 and earlier allows attackers to connect to an attacker-specified Perforce server using attacker-specified username and password.

How urgent is CVE-2021-21655?

Priority 36/100. High severity

Software pages

Jenkins vulnerabilities

Related CVEs

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CVE-2021-21654 MEDIUM 4.3 UPGRADE Jenkins P4 Plugin 1.11.4 and earlier does not perform permission checks in multiple HTTP endpoints, allowing a
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References

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