XSS in Xpressengine
CVE-2021-44912
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.005 (39.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Xpressengine
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)
Frequently asked questions
- What is CVE-2021-44912?
- CVE-2021-44912 is a medium-severity vulnerability in Xpressengine, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2022-02-09.
- How severe is CVE-2021-44912?
- Medium severity. CVSS v3 base score is 5.4 out of 10.