How severe is CVE-2023-40341?

CVE-2023-40341 has a CVSS score of 8.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2023-40341?

CVE-2023-40341 affects the following packages: io.jenkins.blueocean:blueocean (Maven). Ecosystems affected: Maven.

How do I fix CVE-2023-40341?

Update io.jenkins.blueocean:blueocean to 1.27.5.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-40341 is resolved across your whole dependency graph.

How do I detect CVE-2023-40341 in my Maven dependencies?

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

How do I mitigate CVE-2023-40341 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2023-40341 actively exploited in the wild?

No public exploit code has been indexed for CVE-2023-40341 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-2023-40341?

CVE-2023-40341 has an EPSS (Exploit Prediction Scoring System) score of 0.6%, placing it in the 50th 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-2023-40341?

CVE-2023-40341 is classified as Cross-Site Request Forgery (CSRF) (CWE-352). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2023-40341 published, and has it been updated?

CVE-2023-40341 was published on August 16, 2023 and was last updated on October 24, 2026. 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

HIGH severity

CVE-2023-40341 — blueocean

HIGH

CVE-2023-40341 is a high-severity (CVSS 8.8) Cross-Site Request Forgery (CSRF) vulnerability in io.jenkins.blueocean:blueocean. A fix is available for io.jenkins.blueocean:blueocean — see the affected versions and patch details below.

Jenkins Blue Ocean Plugin cross-site request forgery vulnerability

Also known asGHSA-g4pq-p927-7pgg

Published

Aug 16, 2023

Updated

Oct 24, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

A successful exploit gives an attacker total control of the affected component, not partial access.
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-2023-40341.

EPSS Exploitation Probability

via FIRST.org ↗

0.6%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs50th percentile — riskier than 50% 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

☕io.jenkins.blueocean:blueocean

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 Blue Ocean Plugin 1.27.5 and earlier does not require POST requests for an HTTP endpoint, resulting in a cross-site request forgery (CSRF) vulnerability.

This vulnerability allows attackers to connect to an attacker-specified URL, capturing GitHub credentials associated with an attacker-specified job.

This issue is due to an incomplete fix of SECURITY-2502.

Blue Ocean Plugin 1.27.5.1 uses the configured SCM URL, instead of a user-specified URL provided as a parameter to the HTTP endpoint.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`io.jenkins.blueocean:blueocean`	all versions	1.27.5.1`io.jenkins.blueocean:blueocean:1.27.5.1`

Affected Products

1 product · 1 configurations

Application

blue oceanjenkins

≤ 1.27.5

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for io.jenkins.blueocean:blueocean, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update io.jenkins.blueocean:blueocean to 1.27.5.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-40341 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Product	Fixed in	Advisory
OCP-Tools-4.12-RHEL-8	`jenkins-2-plugins-0:4.12.1706515741-1.el8`	RHSA-2024:0778
OCP-Tools-4.14-RHEL-8	`jenkins-2-plugins-0:4.14.1706516441-1.el8`	RHSA-2024:0777

Frequently Asked Questions

Jenkins Blue Ocean Plugin 1.27.5 and earlier does not require POST requests for an HTTP endpoint, resulting in a cross-site request forgery (CSRF) vulnerability. This vulnerability allows attackers to connect to an attacker-specified URL, capturing GitHub credentials associated with an attacker-specified job. This issue is due to an incomplete fix of SECURITY-2502. Blue Ocean Plugin 1.27.5.1 uses the configured SCM URL, instead of a user-specified URL provided as a parameter to the HTTP endpoint.

O3 Security · Impact-Aware SCA

Is CVE-2023-40341 in your dependencies?

Find it across Maven, including transitive dependencies.

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CVSS Score

8.8/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Raw vector

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

CWE Classification

CWE-352Cross-Site Request Forgery (CSRF)

Weaponization

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

Timeline

Disclosed

Aug 16, 2023

Last updated

Oct 24, 2026

Identifiers

CVE-2023-40341

GHSA-g4pq-p927-7pgg

References

Advisoryopenwall.com Advisoryjenkins.io · 2023 08 16 Advisorynvd.nist.gov · CVE 2023 40341

Related vulnerabilities

Also affects blueocean

This CVE is high severity; 1 of 7 other CVEs affecting blueocean is rated as high or higher (top: high).

CVE-2020-2255CVE-2020-2254CVE-2019-1003013CVE-2017-1000105CVE-2017-1000106CVE-2019-1003012CVE-2017-1000110

Same weakness: CWE-352

This CVE is high severity — higher than any of the other 1 CVE with CWE-352 (highest there: low).

CVE-2026-126067Browse all CWE-352

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 24, 2026

CVE-2023-40341 — blueocean

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

Fixing This On Your OS

Frequently Asked Questions

Is CVE-2023-40341 in your dependencies?