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CVE-2025-1217

Date: March 29, 2025

In PHP prior to 8.1.32, 8.2.28, 8.3.19, and 8.4.5, the header parser of the http stream parser does not understand that a header line beginning with whitespace continues the previous header and instead considers every newline to be a header separator. Users of the http stream wrapper might interpret the response with an incorrect MIME type and more generally might misparse the response, for example by incorrectly determining which response headers belong to the final response if a redirect happened.

Severity Score

Severity Score

Weakness Type (CWE)

Improper Input Validation

CWE-20

Interpretation Conflict

CWE-436

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

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