CVE-2026-3240
- Source
- https://cve.org/CVERecord?id=CVE-2026-3240
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3240.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-3240
- Aliases
- Published
- 2026-03-04T02:15:53.400Z
- Modified
- 2026-07-08T07:32:32.127432611Z
- Severity
-
- 4.8 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- Concrete CMS below 9.4.8 is vulnerable to Stored XSS via Legacy form
- Details
-
In Concrete CMS below version 9.4.8, a user with permission to edit a page with element Legacy form can perform a stored XSS attack towards high-privilege accounts via the Question field. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 4.8 with vector CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Thanks minhnn42, namdi and quanlna2 from VCSLab-Viettel Cyber Security for reporting.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3240.json", "cwe_ids": [ "CWE-79" ], "cna_assigner": "ConcreteCMS" }- References
-
- https://documentation.concretecms.org/9-x/developers/introduction/version-history/948-release-notes
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3240.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-3240
- https://github.com/concretecms/concretecms/pull/12826
- https://github.com/concretecms/concretecms
Affected packages
Git / github.com/concretecms/concretecms
Affected ranges
- Type
- GIT
- Repo
- https://github.com/concretecms/concretecms
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
{ "source": [ "AFFECTED_FIELD", "CPE_RANGE" ], "cpe": "cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*", "extracted_events": [ { "introduced": "5" }, { "fixed": "9.4.8" }, { "introduced": "0" } ] }