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

2026-10-20T10:54:58Z

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.

Database specific

{
    "unresolved_ranges":  [
        {
            "cpes":  [
                "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*"
            ],
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "introduced":  "5.2.0"
                        },
                        {
                            "fixed":  "5.3.12"
                        }
                    ],
                    "source":  "CPE_RANGE"
                }
            ],
            "vendor_product":  "sensiolabs:symfony"
        }
    ]
}

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

{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "5.2.0"
                },
                {
                    "fixed":  "5.3.12"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "range":  [
                {
                    "fixed":  "95dcf51682029e89450aee86267e3d553aa7c487"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v5.3.12",
            "range":  [
                {
                    "fixed":  "256c34a45b79fdc6276a8c941a1656713ee1ffec"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Database specific

source

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