Arbitrary file upload in Bookstackapp Bookstack
CVE-2021-3906
bookstack is vulnerable to Unrestricted Upload of File with Dangerous Type
Vulnerability class: Unrestricted File Upload
EPSS: 0.006 (47.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Bookstackapp Bookstack
- Bookstackapp Bookstackapp/bookstack — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@huntr.dev (x_refsource_CONFIRM, Exploit, Patch, Third Party Advisory, Issue Tracking)
- security@huntr.dev (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-3906?
- CVE-2021-3906 is a medium-severity vulnerability in Bookstackapp Bookstack, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 6.5/10. Published 2021-10-27.
- How severe is CVE-2021-3906?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-3906 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.