What’s Vulnerable › Vulnerabilities

CVE-2021-4119: Improper Access Control in bookstackapp/bookstack

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 26.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-12-15 · updated 2026-06-17
• Weakness: CWE-284

Description

bookstack is vulnerable to Improper Access Control

Affected products

• bookstackapp/bookstack: through 21.11.2

References

• https://github.com/bookstackapp/bookstack/commit/e765e618547c92f4e0b46caca6fb91f0174efd99
• https://huntr.dev/bounties/135f2d7d-ab0b-4351-99b9-889efac46fca
• https://github.com/bookstackapp/bookstack/commit/e765e618547c92f4e0b46caca6fb91f0174efd99
• https://huntr.dev/bounties/135f2d7d-ab0b-4351-99b9-889efac46fca

Get alerted when CVE-2021-4119 or the next vulnerability affects your stack