CVE-2025-5263CWE-346

CVE-2025-5263

Medium · published May 27, 2025

CVSS v3.1

4.3

EPSS

Percentile

15.1

In the wild

Unconfirmed

What it is

Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

The record

Technical detail

CVSS v3.1: 4.3 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CVSS v4.0: Not supplied
EPSS: 0.00247 · 15.1th percentile
Weakness: CWE-346 · Origin Validation Error
Published: 2025-05-27T17:15Z

Affected products (3)

Product	Versions	Fixed in
mozilla/firefox	< 115.24.0	115.24.0
mozilla/firefox	< 139.0	139.0
mozilla/firefox	≥ 116.0, < 128.11.0	128.11.0

References (8)

https://bugzilla.mozilla.org/show_bug.cgi?id=1960745 · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-42/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-43/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-44/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-45/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-46/ · [email protected]https://lists.debian.org/debian-lts-announce/2025/05/msg00043.html · af854a3a-2127-422b-91ae-364da2661108 https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html · af854a3a-2127-422b-91ae-364da2661108

EPSS history

Timeline

27 MAY 12:29Z
Error handling for script execution was incorrectly isolated from web content
cvelistv5