Description
Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs processes attacker-controlled data from the /ext URL route in yamcs-web/src/main/webapp/projects/webapp/src/app/core/routes/extension.matcher.ts, extension.component.ts, and app.component.ts without checking registered plugin IDs before DOM rendering through innerHTML. A crafted URL can execute JavaScript when opened by a user. The script can read data available to the Yamcs web application and perform actions in the user context. This issue is fixed in versions 5.12.8 and 5.13.2.
References6
- github.com/yamcs/yamcs/commit/8e18e279d8ce761c21f4f67bbd06a1bff…
- github.com/yamcs/yamcs/commit/ecf34a4e2ccbe085e6ceff0253595b24d…
- github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8
- github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2
- github.com/yamcs/yamcs/security/advisories/GHSA-9272-wg2r-7xmx
- github.com/yamcs/yamcs/security/advisories/GHSA-9272-wg2r-7xmx
Metrics
- CVSS 3.1
-
4.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N - EPSS — exploit probability
- 0% percentile: 32 · as of 8 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.