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Fencer Intel
medium 5.3

CVE-2021-4119 json

Improper Access Control in bookstackapp/bookstack

published 4y ago modified 4mo ago also GHSA-9c5c-5j4h-8q2c , EUVD-2021-2494

cvss
5.3
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
26.9%
EPSS 26.9% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

bookstack is vulnerable to Improper Access Control

Patch / fix

  • packagist ssddanbrown/bookstack 21.11.3
  • bookstackapp bookstackapp/bookstack 21.11.3

Is CVE-2021-4119 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

26.89% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • huntr.dev https://huntr.dev/bounties/135f2d7d-ab0b-4351-99b9-889efac46fca referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub 3.0 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
packagist ssddanbrown/bookstack
<21.11.3
21.11.3

Affected products

  • bookstackapp bookstackapp/bookstack

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.