CVE-2026-8197
Description
Concrete CMS 9.5.0 and below is vulnerable to Stored XSS via OAuth integration name. The OAuth authorize template renders the integration name (admin-controlled) through Concrete's t() translation helper as a sprintf-style format. The ... wrap is built by PHP string interpolation before t() runs, so the integration name lands in the translated output as raw HTML. A rogue admin could potentially snoop on login submissions.The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 7.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N Thanks Yonatan Drori (Tenzai) for reporting.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
concrete5/concrete5Packagist | < 9.5.1 | 9.5.1 |
Affected products
4Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-h72c-xx3w-w8h7ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-8197ghsaADVISORY
- documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notesnvdRelease NotesWEB
News mentions
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