CVE-2025-5271 - Vulnerability Details - OpenCVE

Previewing a response in Devtools ignored CSP headers, which could have allowed content injection attacks. This vulnerability affects Firefox < 139.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Mozilla	Firefox

Configuration 1 [-]

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

No data.

References

Link	Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=1920348
https://nvd.nist.gov/vuln/detail/CVE-2025-5271
https://www.cve.org/CVERecord?id=CVE-2025-5271
https://www.mozilla.org/security/advisories/mfsa2025-42/

History

Wed, 28 May 2025 19:00:00 +0000

Type	Values Removed	Values Added
First Time appeared		Mozilla Mozilla firefox
CPEs		cpe:2.3:a:mozilla:firefox::::::::
Vendors & Products		Mozilla Mozilla firefox

Wed, 28 May 2025 14:45:00 +0000

Type	Values Removed	Values Added
Title		firefox: Devtools' preview ignored CSP headers
Weaknesses		CWE-807
References		https://nvd.nist.gov/vuln/detail/CVE-2025-5271 https://www.cve.org/CVERecord?id=CVE-2025-5271
Metrics	threat_severity `None`	threat_severity `Low`

Tue, 27 May 2025 18:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-116
Metrics		cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Tue, 27 May 2025 12:45:00 +0000

Type	Values Removed	Values Added
Description		Previewing a response in Devtools ignored CSP headers, which could have allowed content injection attacks. This vulnerability affects Firefox < 139.
References		https://bugzilla.mozilla.org/show_bug.cgi?id=1920348 https://www.mozilla.org/security/advisories/mfsa2025-42/

MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2025-05-27T12:29:29.404Z

Updated: 2025-05-27T17:37:33.657Z

Reserved: 2025-05-27T12:29:29.015Z

Link: CVE-2025-5271

Vulnrichment

Updated: 2025-05-27T17:37:27.980Z

NVD

Status : Analyzed

Published: 2025-05-27T13:15:22.923

Modified: 2025-05-28T18:35:56.847

Link: CVE-2025-5271

Redhat

Severity : Low

Publid Date: 2025-05-27T12:29:29Z

Links: CVE-2025-5271 - Bugzilla

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