Vulnerability · Published Sep 15, 2026 · Assigned by VulnCheck

CVE-2026-91922Steedos Platform through 3.0.15-beta.47 Reflected XSS via page render

Medium 6.1

In plain English

A medium-severity cross-site scripting in steedos-platform from steedos. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.3%top 72.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Steedos Platform through 3.0.15-beta.47 contains a reflected cross-site scripting vulnerability in the anonymous /api/page/render endpoint that fails to properly escape query parameters in inline script elements. Attackers can craft malicious links with script-terminating sequences in the schemaApi or data parameters to execute arbitrary JavaScript in victim sessions and steal X-Auth-Token credentials.

Affected products (as reported)

Vendor	Product	Versions
steedos	steedos-platform	0 – through 3.0.15-beta.47

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

GitHub Issue #8354 issue-tracking
https://github.com/steedos/steedos-platform product
page_render.router.js - anonymous route copying schemaApi and data into the template technical-description
page_view.ejs - unescaped EJS output of pageSchema and queryData inside an inline script technical-description
VulnCheck Advisory: Steedos Platform through 3.0.15-beta.47 Reflected XSS via page render third-party-advisory