Medium severity · published Jan 6, 2022
CVE-2021-4194
bookstack is vulnerable to Improper Access Control
6.5
CVSS
0.7%
EPSS
No
On KEV
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BO
Bookstack · Bookstackapp
before 21.12.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-4194
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-4194
Exploit
https://github.com/bookstackapp/bookstack/commit/cb0d674a71449de883713db2fcdccb6e108992ad
Exploit
https://huntr.dev/bounties/0bc8b3f7-9057-4eb7-a989-24cd5689f114
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