CVE-2021-21657 json
XXE vulnerability in Jenkins Filesystem Trigger Plugin
published 2021-05-25 5 y ago modified 2026-06-17 4 mo ago also GHSA-cphv-7cxw-5hcc , EUVD-2022-3603
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.6%
- EPSS 1.6% chance of exploitation in 30 days, percentile 75%
- public exploits
- 0
- none known
Summary
Jenkins Filesystem Trigger Plugin 0.40 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.
Patch / fix
- maven org.jenkins-ci.plugins:fstrigger 0.41
Exploit prediction
1.60% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
| GitHub | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.jenkins-ci.plugins:fstrigger | <0.41 |
0.41 |
Affected products
- Jenkins project Jenkins Filesystem Trigger Plugin
Classification
- Weakness
-
- CWE-611 Improper Restriction of XML External Entity Reference
References
-
jenkins.io
/security/advisory/2021-05-25/#SECURITY-2339
web, vendor-advisory
-
openwall.com
/lists/oss-security/2021/05/25/3
mailing-list, web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-21657
advisory
-
github.com
/jenkinsci/fstrigger-plugin
package
Sources
- CVE List CVE-2021-21657
- GitHub Advisory GHSA-cphv-7cxw-5hcc
- NVD CVE-2021-21657
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