CVE-2021-21657

HIGHNVD 8.88.8—

8.8

Jenkins Filesystem Trigger Plugin 0.40 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 37.0%
KEV: Not listed

Published

May 25, 2021

Last Modified

November 21, 2024

References (4)

jenkinsci-cert@googlegroupshttp://www.openwall.com/lists/oss-security/2021/05/25/3
jenkinsci-cert@googlegroupshttps://www.jenkins.io/security/advisory/2021-05-25/#SECURITY-2339
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/05/25/3
af854a3a-2127-422b-91ae-364da2661108https://www.jenkins.io/security/advisory/2021-05-25/#SECURITY-2339

Affected Packages

(1 across 1 ecosystem)

Maven(1)

Package	Vulnerable range	Fixed in	Dependents
org.jenkins-ci.plugins:fstrigger	0.1 ... 0.9 (41 versions)	0.41	—

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:15 UTCEPSS rescore
2026-06-08 14:15 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore

Frequently asked(5)

What is CVE-2021-21657?

CVE-2021-21657 is a high vulnerability published on May 25, 2021. Jenkins Filesystem Trigger Plugin 0.40 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.

When was CVE-2021-21657 disclosed?

CVE-2021-21657 was first published in the National Vulnerability Database on May 25, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-21657 actively exploited?

CVE-2021-21657 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-21657?

CVE-2021-21657 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2021-21657?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-21657, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-21657

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CVE-2021-21657

📅 Published

🔄 Last Modified

🔗 References (4)