CVE-2021-44912

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-02-09 · updated 2026-06-17
Weakness: CWE-79

Description

In XE 1.116, when uploading the Normal button, there is no restriction on the file suffix, which leads to any file uploading to the files directory. Since .htaccess only restricts the PHP type, uploading HTML-type files leads to stored XSS vulnerabilities. If the .htaccess configuration is improper, for example before the XE 1.11.2 version, you can upload the PHP type file to GETSHELL.

Affected products

XpressEngine: before 1.11.6 — fixed in 1.11.6

How to fix

Upgrade to a fixed version: XpressEngine 1.11.6. Check the vendor advisory for mitigations.

References

https://github.com/xpressengine/xe-core/issues/2433
https://github.com/xpressengine/xe-core/issues/2433

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