vulnerability
Alpine Linux: CVE-2021-21707: Improper Handling of Invalid Use of Special Elements
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:P/I:N/A:N) | Nov 29, 2021 | Aug 22, 2024 | Aug 8, 2025 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:P/I:N/A:N)
Published
Nov 29, 2021
Added
Aug 22, 2024
Modified
Aug 8, 2025
Description
In PHP versions 7.3.x below 7.3.33, 7.4.x below 7.4.26 and 8.0.x below 8.0.13, certain XML parsing functions, like simplexml_load_file(), URL-decode the filename passed to them. If that filename contains URL-encoded NUL character, this may cause the function to interpret this as the end of the filename, thus interpreting the filename differently from what the user intended, which may lead it to reading a different file than intended.
Solutions
alpine-linux-upgrade-php7alpine-linux-upgrade-php8alpine-linux-upgrade-php81
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