CVE-2020-5255 - CVE House
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Status published Low CVE-2020-5255

Prevent cache poisoning via a Response Content-Type header

Vulnerability Description

In Symfony before versions 4.4.7 and 5.0.7, when a `Response` does not contain a `Content-Type` header, affected versions of Symfony can fallback to the format defined in the `Accept` header of the request, leading to a possible mismatch between the response's content and `Content-Type` header. When the response is cached, this can prevent the use of the website by other users. This has been patched in versions 4.4.7 and 5.0.7.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

symfony
Vulnerable Versions:
>= 4.4.0 and < 4.4.7, >= 5.0.0 and < 5.0.7

Timeline

Official Publish: March 30th, 2020
Last Modified: August 4th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L

Weaknesses (CWE)

CWE-435

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.