How severe is CVE-2023-37942?

CVE-2023-37942 has a CVSS score of 6.5/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2023-37942?

CVE-2023-37942 affects the following packages: org.jenkins-ci.plugins:external-monitor-job (Maven). Ecosystems affected: Maven.

How do I fix CVE-2023-37942?

Update org.jenkins-ci.plugins:external-monitor-job to 207.v98a or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-37942 is resolved across your whole dependency graph.

How do I detect CVE-2023-37942 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jenkins-ci.plugins:external-monitor-job, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2023-37942 if there is no patch (or I can't update yet)?

Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.

Is CVE-2023-37942 actively exploited in the wild?

No public exploit code has been indexed for CVE-2023-37942 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2023-37942?

CVE-2023-37942 has an EPSS (Exploit Prediction Scoring System) score of 0.6%, placing it in the 49th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2023-37942?

CVE-2023-37942 is classified as XML External Entity (XXE) (CWE-611). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2023-37942 published, and has it been updated?

CVE-2023-37942 was published on July 12, 2023 and was last updated on February 16, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

MEDIUM severity

CVE-2023-37942 — external-monitor-job

MEDIUM

CVE-2023-37942 is a medium-severity (CVSS 6.5) XML External Entity (XXE) vulnerability in org.jenkins-ci.plugins:external-monitor-job. A fix is available for org.jenkins-ci.plugins:external-monitor-job — see the affected versions and patch details below.

Jenkins External Monitor Job Type Plugin XML external entity vulnerability

Published

Jul 12, 2023

Updated

Feb 16, 2024

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 2, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-37942.

EPSS Exploitation Probability

via FIRST.org ↗

0.6%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs49th percentile — riskier than 49% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected

☕org.jenkins-ci.plugins:external-monitor-job

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Jenkins External Monitor Job Type Plugin 206.v9a_94ff0b_4a_10 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks.

This allows attackers with Item/Build permission to have Jenkins parse a crafted HTTP request with XML data that uses external entities for extraction of secrets from the Jenkins controller or server-side request forgery.

External Monitor Job Type Plugin 207.v98a_a_37a_85525 disables external entity resolution for its XML parser.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.jenkins-ci.plugins:external-monitor-job`	all versions	207.v98a`org.jenkins-ci.plugins:external-monitor-job:207.v98a`

Affected Products

1 product · 1 configurations

Application

external monitor job typejenkins

≤ 206.v9a_94ff0b_4a_10

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.jenkins-ci.plugins:external-monitor-job, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.jenkins-ci.plugins:external-monitor-job to 207.v98a or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-37942 is resolved across your whole dependency graph.
Workarounds
Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.

Frequently Asked Questions

Jenkins External Monitor Job Type Plugin 206.v9a_94ff0b_4a_10 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks. This allows attackers with Item/Build permission to have Jenkins parse a crafted HTTP request with XML data that uses external entities for extraction of secrets from the Jenkins controller or server-side request forgery. External Monitor Job Type Plugin 207.v98a_a_37a_85525 disables external entity resolution for its XML parser.

O3 Security · Impact-Aware SCA

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Find it across Maven, including transitive dependencies.

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CVSS Score

6.5/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Raw vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CWE Classification

CWE-611XML External Entity (XXE)

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

Timeline

Disclosed

Jul 12, 2023

Last updated

Feb 16, 2024

Identifiers

CVE-2023-37942

References

Advisorynvd.nist.gov · CVE 2023 37942 Webjenkins.io · 2023 07 12 Webopenwall.com

Related vulnerabilities

Also affects external-monitor-job

This CVE is medium severity, in line with the other 1 CVE affecting external-monitor-job.

CVE-2022-36886

Same weakness: CWE-611

This CVE is medium severity; 6 of 7 other CVEs with CWE-611 are rated as high or higher (top: critical).

CVE-2026-126062CVE-2026-108358CVE-2026-108357CVE-2026-61586CVE-2026-61741CVE-2026-61570CVE-2026-55848Browse all CWE-611

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedFeb 16, 2024

CVE-2023-37942 — external-monitor-job

Exploitation Status

No confirmed exploitation observed yet

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2023-37942 in your dependencies?