XSS in Mjdm Majordomo
CVE-2026-27176
MajorDoMo (aka Major Domestic Module) contains a reflected cross-site scripting (XSS) vulnerability in command.php. The $qry parameter is rendered directly into the HTML page without sanitization via htmlspecialchars(), both in an input field value attribute and in a paragraph element. An attacker can inject arbitrary JavaScript by crafting a URL with malicious content in the qry parameter.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.006 (46.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.002
Affected products
- Mjdm Majordomo
- Sergejey Majordomo — versions 0
Weakness classification (CWE)
References
- chocapikk.com/posts/2026/majordomo-revisited/ (Exploit, Third Party Advisory, third-party-advisory)
- github.com/sergejey/majordomo/pull/1177 (issue-tracking, Exploit, patch, Issue Tracking)
- www.vulncheck.com/advisories/majordomo-reflected-cross-site-scripting-in-comman… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-27176?
- CVE-2026-27176 is a medium-severity vulnerability in Mjdm Majordomo, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-02-18.
- How severe is CVE-2026-27176?
- Medium severity. CVSS v3 base score is 6.1 out of 10.