Concrete CMS versions 9.0.0 to 9.3.4 and below 8.5.18 are vulnerable to Stored XSS in the "Next&Previous Nav" block. A rogue administrator could add a malicious payload  by executing it in the browsers of targeted users. The Concrete CMS Security Team gave this vulnerability a CVSS v4 score of 4.6 with vector  CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N  Since the "Next&Previous Nav" block output was not sufficiently sanitized, the malicious payload could be executed in the browsers of targeted users. Thanks, Chu Quoc Khanh for reporting.

ConcreteCMS CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

ConcreteCMS CWE-79

ConcreteCMS https://documentation.concretecms.org/9-x/developers/introduction/version-history/934-release-notes [No types assigned]

ConcreteCMS https://documentation.concretecms.org/developers/introduction/version-history/8519-release-notes [No types assigned]

ConcreteCMS https://github.com/concretecms/concretecms/commit/ce5ee2ab83fe8de6fa012dd51c5a1dde05cb0dc4 [No types assigned]

ConcreteCMS https://github.com/concretecms/concretecms/pull/12204 [No types assigned]