CVE-2026-91922: steedos-platform · Cross-site Scripting
Affects steedos-platformSource CVE Database V5
Not known to be exploited · CVSS 5.3 Medium.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 27% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 15 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| steedossteedos-platform | Affected
| Fixed in– |
GitHubsteedos/steedos-platformpkg:github/steedos/steedos-platformOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Until an official fix is available, avoid exposing the vulnerable endpoint to untrusted users or implement input validation and output encoding as a temporary mitigation.
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.
References
- github.com/steedos/steedos-platform/issues/8354 (opens in a new tab)
- github.com/steedos/steedos-platform (opens in a new tab)
- github.com/steedos/steedos-platform/blob/044423a3f326d86cf17f0e45adcbd44d2d3b06dd/services/service-pages/main/default/routes/page_render.router.js (opens in a new tab)
- github.com/steedos/steedos-platform/blob/044423a3f326d86cf17f0e45adcbd44d2d3b06dd/services/service-pages/main/default/routes/page_view.ejs (opens in a new tab)
- vulncheck.com/advisories/steedos-platform-through-3.0.15-beta.47-reflected-xss-via-page-render (opens in a new tab)