CVE-2021-41267

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Source
https://cve.org/CVERecord?id=CVE-2021-41267
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41267.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-41267
Aliases
Published
2021-11-24T19:15:07Z
Modified
2026-08-07T19:57:38Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N CVSS Calculator
Summary
[none]
Details

Symfony/Http-Kernel is the HTTP kernel component for Symfony, a PHP framework for web and console applications and a set of reusable PHP components. Headers that are not part of the "trusted_headers" allowed list are ignored and protect users from "Cache poisoning" attacks. In Symfony 5.2, maintainers added support for the X-Forwarded-Prefix headers, but this header was accessible in SubRequest, even if it was not part of the "trusted_headers" allowed list. An attacker could leverage this opportunity to forge requests containing a X-Forwarded-Prefix header, leading to a web cache poisoning issue. Versions 5.3.12 and later have a patch to ensure that the X-Forwarded-Prefix header is not forwarded to subrequests when it is not trusted.

References

Affected packages

Git / github.com/symfony/symfony

Affected ranges

Type
GIT
Repo
https://github.com/symfony/symfony
Events
Introduced
8b51547061b29081803eb9fdf9b02cf80a1e1a74
Fixed
256c34a45b79fdc6276a8c941a1656713ee1ffec
Fixed
95dcf51682029e89450aee86267e3d553aa7c487
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "5.2.0"
        },
        {
            "fixed": "5.3.12"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41267.json"