CVE-2025-4919

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total 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

8.63% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 94.7% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

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

Red Hat severity

Important. 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

2025-05-17 21:07Z1 YR AGO

Last updated

2026-04-13 14:25Z4 MO AGO

Reserved

2025-05-17

Assigning CNA

mozilla

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

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

Weaknesses

• CWE-125Out-of-bounds ReadBase
• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

186d1753e020c261734ec3e28eec994dd7556db31c28b231db9d0c9497cae00e

• bugzilla.mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=1966614
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2025-36/
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2025-37/
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2025-38/
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2025-40/
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2025-41/
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00046.html
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00024.html