CVE-2025-7339

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.20% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 10.7% of scored records. A rank, not a probability.

NVD base score

3.4 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Deferred. NVD last modified this record on 2026-06-17.

Red Hat severity

Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2025-07-17 15:47Z1 YR AGO

Last updated

2025-07-17 20:24Z1 YR AGO

Reserved

2025-07-07

Assigning CNA

openjs

Record state

PUBLISHED

Severity

Low (CVSS 3.4)

CNA CVSS vector

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

Weaknesses

• CWE-241Improper Handling of Unexpected Data TypeBase

Data version

5.1

Document digest

a178e6dffa7cfdad4177ffb46cfb6543836abc38cf231dbef097e0e9b598a097

• github.comhttps://github.com/jshttp/on-headers/security/advisories/GHSA-76c9-3jph-rj3q
• github.comhttps://github.com/jshttp/on-headers/commit/c6e384908c9c6127d18831d16ab0bd96e1231867
• cna.openjsf.orghttps://cna.openjsf.org/security-advisories.html
• github.comhttps://github.com/expressjs/morgan/issues/315
• github.comhttps://github.com/jshttp/on-headers/issues/15