CVE-2024-23898: Jenkins Project Jenkins vulnerability

Should you act?

High exploit likelihood

EPSS ranks it in the top 5% of all CVEs for likely exploitation in the next 30 days. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

• No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
• EPSS 67.2%, percentile 99: FIRST’s model estimates a 67.2% chance of exploitation activity in the next 30 days, higher than 99% of all scored CVEs (very high). EPSS is a probability, not a verdict.
• Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.
• Editorial verdict: Act now. Jenkins CLI Arbitrary File Read (CVE-2024-23897) — An unpatched Jenkins controller reachable by untrusted users leaks files and secrets that can lead to full takeover; upgrade now or disable the CLI.

What it is

Jenkins 2.217 through 2.441 (both inclusive), LTS 2.222.1 through 2.426.2 (both inclusive) does not perform origin validation of requests made through the CLI WebSocket endpoint, resulting in a cross-site WebSocket hijacking (CSWSH) vulnerability, allowing attackers to execute CLI commands on the Jenkins controller.

Weakness type: CWE-346.

Product: Jenkins Project Jenkins · Assigned by: jenkins · Published: 2024-01-24

Affected and fixed versions

Severity scores

• Attack vector: network (remotely reachable)
• Attack complexity: low
• Privileges required: none (no login)
• User interaction: required (a user must click/open something)
• Scope: unchanged

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

• CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
• CISA SSVC assessment: exploitation none, automatable no, technical impact total.
• FIRST EPSS (model of 2026-10-21): 67.15% probability of exploitation activity in the next 30 days; percentile 99.

Timeline

• 2024-01-24 — CVE record published by jenkins
• 2024-01-24 — erroneo.us brief: Jenkins CLI Arbitrary File Read (CVE-2024-23897)
• 2025-06-20 — CVE record last updated

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Vendor and project advisories, patches

1. Jenkins Security Advisory 2024-01-24 jenkins.io

Vulnerability records

1. CVE.org record CVE-2024-23898 cve.org
2. NVD entry CVE-2024-23898 nvd.nist.gov

Other references from the CVE record and advisory

1. sonarsource.com sonarsource.com
2. openwall.com openwall.com

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