XSS in Themoos Core-Moos
CVE-2026-85453
MOOS core-moos through 10.4.0 fails to escape database contents when rendering MOOSDB HTTP pages, allowing attackers to inject malicious scripts. Any MOOS publisher can set variable values containing script payloads that execute in the browser of operators viewing the web interface.
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: 0.003 (25.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/themoos/core-moos (Product, product)
- github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core… (technical-description, Patch, Issue Tracking)
- github.com/themoos/core-moos/commit/a3f26f099bb08decb143f704d8b1ca16ae405b44 (Patch, patch, Issue Tracking)
- github.com/themoos/core-moos/pull/78 (issue-tracking, Patch, patch, Issue Tracking)
- www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-moosdb-http-pages-st… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-85453?
- CVE-2026-85453 is a medium-severity vulnerability in Themoos Core-Moos, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-09-03.
- How severe is CVE-2026-85453?
- Medium severity. CVSS v3 base score is 6.1 out of 10.