PT-2021-16921 · Joomla · Joomla!

Lee Jinheon + 1 · Published 2021-03-04 · Updated 2025-04-03 · CVE-2021-26028

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions Joomla! versions 3.0.0 through 3.9.24

Description An issue was discovered where extracting a specifically crafted zip package could write files outside of the intended path.

Recommendations For Joomla! versions 3.0.0 through 3.9.24, update to a version that contains a fix for this issue.

Exploit

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

BIT-JOOMLA-2021-26028

CVE-2021-26028

GHSA-VGWR-773Q-7J3C

Affected Products

Joomla!

References · 7

• 🔥 https://github.com/FriendsOfPHP/security-advisories/blob/master/joomla/archive/CVE-2021-26028.yaml · Exploit
• https://osv.dev/vulnerability/GHSA-vgwr-773q-7j3c · Vendor Advisory
• https://developer.joomla.org/security-centre/848-20210308-core-path-traversal-within-joomla-archive-zip-class.html · Vendor Advisory
• https://osv.dev/vulnerability/BIT-joomla-2021-26028 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-26028 · Security Note
• https://osv.dev/vulnerability/CVE-2021-26028 · Vendor Advisory
• https://github.com/joomla-framework/archive/commit/32c9009a1020d16bc1060c0d06339898b697cf2c · Note