CVE-2026-73327

high

Description

Joomla 6.1.1 contains a path traversal vulnerability in the com_joomlaupdate extension that allows a Super User to be induced into extracting a crafted archive containing directory traversal sequences or absolute paths in ZIP entry filenames. Attackers can supply malicious ZIP entry names with parent-directory segments or absolute paths to the extract.php extraction routine, causing files to be written outside the intended destination root and enabling persistent remote code execution via planted PHP files.

References

https://www.vulncheck.com/advisories/joomla-zip-slip-path-traversal-via-com-joomlaupdate-extract-php

https://github.com/joomla/joomla-cms/pull/48057

https://github.com/joomla/joomla-cms/commit/9678a171d37e1e10ca75c9124bdafe20fe14fa5b

https://github.com/joomla/joomla-cms

Details

Source: Mitre, NVD

Published: 2026-08-12

Updated: 2026-08-12

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:H/Au:M/C:C/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.6

Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H

Severity: High

CVSS v4

Base Score: 8.7

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Severity: High