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CVE-2021-29503

HIGH

8.1

Descripcion

HedgeDoc is a platform to write and share markdown. HedgeDoc before version 1.8.2 is vulnerable to a cross-site scripting attack using the YAML-metadata of a note. An attacker with write access to a note can embed HTML tags in the Open Graph metadata section of the note, resulting in the frontend rendering the script tag as part of the `<head>` section. Unless your instance prevents guests from editing notes, this vulnerability allows unauthenticated attackers to inject JavaScript into notes that allow guest edits. If your instance prevents guests from editing notes, this vulnerability allows authenticated attackers to inject JavaScript into any note pages they have write-access to. This vulnerability is patched in version 1.8.2. As a workaround, one can disable guest edits until the next update.

Detalles CVE

Puntuacion CVSS v3.18.1

SeveridadHIGH

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

Vector de ataqueNETWORK

ComplejidadLOW

Privilegios requeridosNONE

Interaccion usuarioREQUIRED

Publicado5/19/2021

Ultima modificacion11/21/2024

Fuentenvd

Avistamientos honeypot0

Productos afectados

hedgedoc:hedgedoc

Debilidades (CWE)

CWE-80CWE-79

Referencias

https://github.com/hedgedoc/hedgedoc/commit/01dad5821ee28377ebe640c6c72c3e0bb0d51ea7(security-advisories@github.com)

https://github.com/hedgedoc/hedgedoc/releases/tag/1.8.2(security-advisories@github.com)

https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-gjg7-4j2h-94fq(security-advisories@github.com)

https://github.com/hedgedoc/hedgedoc/commit/01dad5821ee28377ebe640c6c72c3e0bb0d51ea7(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/hedgedoc/hedgedoc/releases/tag/1.8.2(af854a3a-2127-422b-91ae-364da2661108)

https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-gjg7-4j2h-94fq(af854a3a-2127-422b-91ae-364da2661108)

Correlaciones IOC

Sin correlaciones registradas

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