CVE-2018-15882

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-08-29 · updated 2026-06-17
Weakness: CWE-434

Description

An issue was discovered in Joomla! before 3.8.12. Inadequate checks in the InputFilter class could allow specifically prepared phar files to pass the upload filter.

Affected products

Joomla!: before 3.8.12 — fixed in 3.8.12

How to fix

Upgrade to a fixed version: Joomla! 3.8.12. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/105166
http://www.securitytracker.com/id/1041913
https://developer.joomla.org/security-centre/743-20180801-core-hardening-the-inputfilter-for-phar-stubs.html
http://www.securityfocus.com/bid/105166
http://www.securitytracker.com/id/1041913
https://developer.joomla.org/security-centre/743-20180801-core-hardening-the-inputfilter-for-phar-stubs.html

Get alerted when CVE-2018-15882 or the next vulnerability affects your stack