Cyber Resilience

CVE-2025-8037

Critical

Published: 22 July 2025

Published
22 July 2025
Modified
13 April 2026
KEV Added
—
Patch
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CVSS Score v3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS Score 0.0022 44.3th percentile
Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-8037 is a critical-severity Sensitive Cookie in HTTPS Session Without 'Secure' Attribute (CWE-614) vulnerability in Mozilla Firefox. Its CVSS base score is 9.1 (Critical).

Operationally, ranked at the 44.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

Setting a nameless cookie with an equals sign in the value shadowed other cookies. Even if the nameless cookie was set over HTTP and the shadowed cookie included the `Secure` attribute. This vulnerability was fixed in Firefox 141, Firefox ESR…

more

140.1, Thunderbird 141, and Thunderbird 140.1.

CWE(s)
CWE-614

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

mozilla
firefox
≤ 140.1 · ≤ 141.0
mozilla
thunderbird
≤ 140.1 · ≤ 141.0

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-23 Session Authenticity
addresses: CWE-614

Forces the Secure flag on session cookies, preventing their transmission over unauthenticated HTTP channels.

SC-8 Transmission Confidentiality and Integrity
addresses: CWE-614

Enforcing confidentiality on transmitted sensitive cookies requires the Secure attribute, preventing exposure on insecure channels.

References