bookstack is vulnerable to Improper Access Control

MEDIO 4.3CVE-2021-4026 · GHSA-jm6p-wfjg-xm7x · Published 30/11/2021 · updated 17/06/2026

En resumen

CVE-2021-4026 es una vulnerabilidad MEDIO (CVSS 4.3) que afecta a ssddanbrown/bookstack, bookstack (bookstackapp).
Probabilidad de explotación en los próximos 30 días (EPSS): 0.93%, mayor que el 60.5% de las vulnerabilidades.
Solución: actualizar a 21.11.2 o posterior.

Package	Affected versions	Patched versions
ssddanbrown/bookstack Packagist	`< 21.11.2`	`21.11.2`
bookstack bookstackapp	`< 21.11.2`	`21.11.2`

bookstack is vulnerable to Improper Access Control.

NVD description

bookstack is vulnerable to Improper Access Control

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Package

Affected versions

Patched versions

Packagist

< 21.11.2

21.11.2

< 21.11.2

21.11.2

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