CVE-2021-21707

Public on 2021-11-29
Modified on 2024-01-30
Description
A flaw was found in php. The main cause of this vulnerability is improper input validation while parsing an Extensible Markup Language(XML) entity. A special character could allow an attacker to traverse directories. The highest threat from this vulnerability is confidentiality.
Severity
Medium severity
Medium
CVSS v3 Base Score
5.3
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Php8.0 Extra php 2023-08-04 ALAS2PHP8.0-2023-001 Fixed
Amazon Linux 1 php56 No Fix Planned
Amazon Linux 2023 php8.1 Not Affected
Amazon Linux 2023 php8.2 Not Affected

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD CVSSv2 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N
NVD CVSSv3 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N