CVE-2025-5266
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- CVE-2025-5266
CVE Details
| Release Date: | 2025-05-27 | |
| Impact: | Moderate | What is this? |
Description
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.
See more information about CVE-2025-5266 from MITRE CVE dictionary and NIST NVD
NOTE: The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 metrics
| Base Score: | 6.1 |
| Vector String: | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| Version: | 3.1 |
| Attack Vector: | Network |
| Attack Complexity: | Low |
| Privileges Required: | None |
| User Interaction: | Required |
| Scope: | Changed |
| Confidentiality Impact: | Low |
| Integrity Impact: | Low |
| Availability Impact: | None |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 7 (firefox) | ELSA-2025-9074 | 2025-06-23 |
| Oracle Linux version 8 (firefox) | ELSA-2025-8308 | 2025-05-29 |
| Oracle Linux version 8 (thunderbird) | ELSA-2025-8756 | 2025-06-10 |
| Oracle Linux version 9 (firefox) | ELSA-2025-8293 | 2025-05-29 |
| Oracle Linux version 9 (thunderbird) | ELSA-2025-8607 | 2025-06-06 |
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