CVE-2021-21706
MEDIUM6.5EPSS 0.53%ZipArchive::extractTo may extract outside of destination dir
Published: 8/11/2025Modified: 8/11/2025
Description
In PHP versions 7.3.x below 7.3.31, 7.4.x below 7.4.24 and 8.0.x below 8.0.11, in Microsoft Windows environment, ZipArchive::extractTo may be tricked into writing a file outside target directory when extracting a ZIP file, thus potentially causing files to be created or overwritten, subject to OS permissions.
Affected packages (3)
- Bitnami/libphp>= 7.3.0, < 7.3.31, >= 7.4.0, < 7.4.24, >= 8.0.0, < 8.0.11
- Bitnami/php>= 7.3.0, < 7.3.31, >= 7.4.0, < 7.4.24, >= 8.0.0, < 8.0.11
- Bitnami/php-min>= 7.3.0, < 7.3.31, >= 7.4.0, < 7.4.24, >= 8.0.0, < 8.0.11
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |