CVE-2025-5269

HighCVSS 8.1/10Last modified Oct 5, 2026

Description

Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128.11 and Thunderbird 128.11.

Metrics

CVSS 3.1 8.1/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

Vendor	Product	Versions
Mozilla	Firefox	—
Mozilla	Thunderbird	—

References

Timeline

Published: May 27, 2025
Last modified: Oct 5, 2026
NVD status: Modified

Related CVEs from 2025

CVE-2025-526908.1Successful exploitation of the vulnerability could allow an attacker to execute arbitrary commands as root, potentially leading to the loss CVE-2025-5269110.0Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any location on the mail s CVE-2025-526928.8Successful exploitation of the vulnerability could allow an attacker with local network access to send a specially crafted URL to access cer CVE-2025-526949.8Successful exploitation of the SQL injection vulnerability could allow an unauthenticated remote attacker to execute arbitrary SQL commands CVE-2025-52707.5In certain cases, SNI could have been sent unencrypted even when encrypted DNS was enabled. This vulnerability was fixed in Firefox 139 and CVE-2025-527076.5Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Firelight Firelight Lightbox easy-fanc CVE-2025-527087.5Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') vulnerability in RealMag777 HUSKY wo CVE-2025-52716.5Previewing a response in Devtools ignored CSP headers, which could have allowed content injection attacks. This vulnerability was fixed in F CVE-2025-527105.9Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Ninja Team File Manager Pro filester a CVE-2025-527114.3Cross-Site Request Forgery (CSRF) vulnerability in BoldGrid Post and Page Builder by BoldGrid post-and-page-builder allows Cross Site Reques CVE-2025-527124.2Path Traversal: '.../...//' vulnerability in BoldGrid Post and Page Builder by BoldGrid post-and-page-builder allows Path Traversal.This iss CVE-2025-527136.4Server-Side Request Forgery (SSRF) vulnerability in BoldGrid Post and Page Builder by BoldGrid post-and-page-builder allows Server Side Requ