CVE-2025-6491

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

0.99% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 60.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

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

Red Hat severity

Moderate. 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

2025-07-13 22:10Z1 YR AGO

Last updated

2025-11-04 21:14Z10 MO AGO

Reserved

2025-06-22

Assigning CNA

php

Record state

PUBLISHED

Severity

Medium (CVSS 5.9)

CNA CVSS vector

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

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

54aa6d80c3a2b5760c68e5db291ba44d7f2c68fe58c35cfa72a77281237babb7

• github.comhttps://github.com/php/php-src/security/advisories/GHSA-453j-q27h-5p8x
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/07/msg00017.html
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2025/07/11/4