CVE-2026-85453: MOOS core-moos through 10.4.0 MOOSDB HTTP Pages Stored Cross-Site Scripting

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-03 · updated 2026-10-14
Weakness: CWE-79

Description

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.

Affected products

themoos core-moos: before 10.4.0 — fixed in 10.4.0

How to fix

Upgrade to a fixed version: themoos core-moos 10.4.0. Check the vendor advisory for mitigations.

References

https://github.com/themoos/core-moos
https://github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core/libMOOS/DB/HTTPConnection.cpp#L460
https://github.com/themoos/core-moos/commit/a3f26f099bb08decb143f704d8b1ca16ae405b44
https://github.com/themoos/core-moos/pull/78
https://www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-moosdb-http-pages-stored-cross-site-scripting

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