CVE-2021-3906
MEDIUMCVSS 6.5/10EPSS 0.65%
Last modified
CVE-2021-3906 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. bookstack is vulnerable to Unrestricted Upload of File with Dangerous Type. EPSS estimates a 0.65% chance of exploitation in the next 30 days.
Description
bookstack is vulnerable to Unrestricted Upload of File with Dangerous Type
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Bookstackapp | Bookstack | < 21.10.1 |
References
- https://github.com/bookstackapp/bookstack/commit/64937ab826b56d086af9ecea532510d37520ebc8Patch, Third Party Advisory
- https://huntr.dev/bounties/f115bdf5-c06b-4627-a6fa-ba6904a43ba3Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/bookstackapp/bookstack/commit/64937ab826b56d086af9ecea532510d37520ebc8Patch, Third Party Advisory
- https://huntr.dev/bounties/f115bdf5-c06b-4627-a6fa-ba6904a43ba3Exploit, Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3906?
bookstack is vulnerable to Unrestricted Upload of File with Dangerous Type
How severe is CVE-2021-3906?
CVE-2021-3906 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.65% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3906?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-39054IBM Spectrum Copy Data Management 2.2.13 and earlier could a…5.4
- CVE-2021-39055IBM Spectrum Copy Data Management 2.2.0.0 through 2.2.14.3 i…5.4
- CVE-2021-39056The IBM i 7.1, 7.2, 7.3, and 7.4 Extended Dynamic Remote SQL…6.5
- CVE-2021-39057IBM Spectrum Protect Plus 10.1.0.0 through 10.1.8.x is vulne…8.1
- CVE-2021-39058IBM Spectrum Copy Data Management 2.2.13 and earlier uses we…7.5
- CVE-2021-39059IBM Jazz Foundation (IBM Jazz Team Server 6.0.6, 6.0.6.1, 7.…5.4
- CVE-2021-39063IBM Spectrum Protect Plus 10.1.0.0 through 10.1.8.x uses Cro…9.1
- CVE-2021-39064IBM Spectrum Copy Data Management 2.2.13 and earlier has wea…7.5
- CVE-2021-39065IBM Spectrum Copy Data Management 2.2.13 and earlier could a…9.8
- CVE-2021-39066IBM Financial Transaction Manager 3.2.4 does not invalidate …8.8
- CVE-2021-39068IBM Curam Social Program Management 8.0.1 and 7.0.11 is vuln…5.4
- CVE-2021-3907OctoRPKI does not escape a URI with a filename containing ".…9.8
Are you affected by CVE-2021-3906?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST