CVE-2025-5266
firefox: thunderbird: Script element events leaked cross-origin resource status
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability affects Firefox < 139 and Firefox ESR < 128.11.
Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability affects Firefox < 139, Firefox ESR < 128.11, Thunderbird < 139, and Thunderbird < 128.11.
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Script elements loading cross-origin resources generate load and error events which can leak information enabling XS-Leaks attacks.
Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code or cross-origin leaks. For the stable distribution (bookworm), these problems have been fixed in version 128.11.0esr-1~deb12u1.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2025-05-27 CVE Reserved
- 2025-05-27 CVE Published
- 2025-06-11 CVE Updated
- 2025-08-03 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
- CWE-829: Inclusion of Functionality from Untrusted Control Sphere
CAPEC
References (7)
URL | Date | SRC |
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URL | Date | SRC |
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URL | Date | SRC |
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https://access.redhat.com/security/cve/CVE-2025-5266 | 2025-06-17 | |
https://bugzilla.redhat.com/show_bug.cgi?id=2368755 | 2025-06-17 |
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
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Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Mozilla Search vendor "Mozilla" | Firefox Search vendor "Mozilla" for product "Firefox" | * | - |
Affected
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Mozilla Search vendor "Mozilla" | Firefox Esr Search vendor "Mozilla" for product "Firefox Esr" | * | - |
Affected
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Mozilla Search vendor "Mozilla" | Thunderbird Search vendor "Mozilla" for product "Thunderbird" | * | - |
Affected
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Slackware Search vendor "Slackware" | Slackware Linux Search vendor "Slackware" for product "Slackware Linux" | * | - |
Affected
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