CVE-2026-3241

MEDIUM

4.8

Descricao

In Concrete CMS below version 9.4.8, a stored cross-site scripting (XSS) vulnerability exists in the "Legacy Form" block. An authenticated user with permissions to create or edit forms (e.g., a rogue administrator) can inject a persistent JavaScript payload into the options of a multiple-choice question (Checkbox List, Radio Buttons, or Select Box). This payload is then executed in the browser of any user who views the page containing the form. 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 M3dium for reporting.

Detalhes CVE

Pontuacao CVSS v3.14.8

SeveridadeMEDIUM

Vetor CVSSCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Vetor de ataqueNETWORK

ComplexidadeLOW

Privilegios necessariosHIGH

Interacao do usuarioREQUIRED

Publicado3/4/2026

Ultima modificacao3/4/2026

Fontenvd

Avistamentos honeypot0

Produtos afetados

concretecms:concrete_cms

Fraquezas (CWE)

CWE-79

Referencias

https://documentation.concretecms.org/9-x/developers/introduction/version-history/948-release-notes(ff5b8ace-8b95-4078-9743-eac1ca5451de)

https://github.com/concretecms/concretecms/pull/12826(ff5b8ace-8b95-4078-9743-eac1ca5451de)

Correlacoes IOC

Sem correlacoes registradas

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