CVE-2025-0237

Description

The WebChannel API, which is used to transport various information across processes, did not check the sending principal but rather accepted the principal being sent. This could have led to privilege escalation attacks. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.10%
Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Affected: Mozilla Firefox ESR
Affected: Mozilla Thunderbird
Affected: Mozilla Thunderbird
Published at:
Updated at:

References

Link Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1915257 issue tracking permissions required
https://www.mozilla.org/security/advisories/mfsa2025-01/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2025-02/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2025-04/ vendor advisory
https://www.mozilla.org/security/advisories/mfsa2025-05/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2025-0237?
CVE-2025-0237 has been scored as a medium severity vulnerability.
How to fix CVE-2025-0237?
To fix CVE-2025-0237, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-0237 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-0237 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-0237?
CVE-2025-0237 affects Mozilla Firefox, Mozilla Firefox ESR, Mozilla Thunderbird, Mozilla Thunderbird.
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