CVE-2021-21659
XXE vulnerability in Jenkins URLTrigger Plugin
Jenkins URLTrigger Plugin 0.48 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.
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
- High
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Jenkins URLTrigger Plugin 0.48 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.
- Record
CVE-2021-21659- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - CVSS 2.0
- 5.5 Medium
AV:N/AC:L/Au:S/C:P/I:N/A:P - Updated
- 2026-11-02
CVE List No score
Jenkins URLTrigger Plugin 0.48 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.
- Record
CVE-2021-21659- Updated
- 2026-11-02
EUVDEUVD-2022-2106 No score
Jenkins URLTrigger Plugin 0.48 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.
- Record
EUVD-2022-2106- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-34j5-c4cv-mmg5
XXE vulnerability in Jenkins URLTrigger Plugin
Jenkins URLTrigger Plugin 0.48 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.
This allows attackers with Job/Configure permission or otherwise able to control the contents of an URL to an XML document being examined for changes to have Jenkins parse a crafted XML document that uses external entities for extraction of secrets from the polling Jenkins controller or agent, server-side request forgery, or denial-of-service attacks.
UJenkins RLTrigger Plugin 0.49 disables external entity resolution for its XML parser.
- Record
GHSA-34j5-c4cv-mmg5- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - Weakness
- CWE-611
- Updated
- 2026-11-02
OSV
Jenkins URLTrigger Plugin 0.48 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.
- Record
CVE-2021-21659- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-34j5-c4cv-mmg5
XXE vulnerability in Jenkins URLTrigger Plugin
Jenkins URLTrigger Plugin 0.48 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.
This allows attackers with Job/Configure permission or otherwise able to control the contents of an URL to an XML document being examined for changes to have Jenkins parse a crafted XML document that uses external entities for extraction of secrets from the polling Jenkins controller or agent, server-side request forgery, or denial-of-service attacks.
UJenkins RLTrigger Plugin 0.49 disables external entity resolution for its XML parser.
- Record
GHSA-34j5-c4cv-mmg5- CVSS 3.1
- 8.1 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - Weakness
- CWE-611
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.jenkins-ci.plugins:urltriggerMaven |
through 0.48 | 0.49 |
org.jenkins-ci.plugins:urltriggerMaven |
before 0.49, plus listed versions 0.10.100.110.130.14 Show 45 moreShow less0.150.160.170.180.190.20.200.210.220.230.240.250.260.270.280.290.30.300.310.320.330.340.350.360.370.380.390.40.4.10.4.20.4.30.400.410.430.440.450.460.470.480.50.5.10.60.70.80.9 |
0.49 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-21659 is a high vulnerability (CVSS 8.1) in Jenkins Urltrigger, published May 25, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 66.8%, the 99th percentile. Fixed in org.jenkins-ci.plugins:urltrigger 0.49.