CVE-2026-28343

CKEditor: Cross-site scripting (XSS) in the HTML Support package

CVSS 6.4 MEDIUMEPSS 0.3%CWE-79

Vexday Risk Score

13Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 6.4EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

05 mar 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

CKEditor 5 is a modern JavaScript rich-text editor with an MVC architecture. Starting in version 29.0.0 and prior to version 47.6.0, a cross-site scripting (XSS) vulnerability has been discovered in the General HTML Support feature. This vulnerability could be triggered by inserting specially crafted markup, leading to unauthorized JavaScript code execution, if the editor instance used an unsafe General HTML Support configuration. This issue has been patched in version 47.6.0.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Produtos afetados

ckeditor · ckeditor5

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Referências

https://github.com/ckeditor/ckeditor5/releases/tag/v29.0.0 https://github.com/ckeditor/ckeditor5/releases/tag/v47.6.0 https://github.com/ckeditor/ckeditor5/security/advisories/GHSA-jrqm-vmqc-gm93