CVE-2021-3916
MEDIUMCVSS 6.5/10EPSS 1.20%
Last modified
CVE-2021-3916 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'). EPSS estimates a 1.20% chance of exploitation in the next 30 days.
Description
bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
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 | < 21.10.3 |
References
- https://github.com/bookstackapp/bookstack/commit/43830a372fc51a8793199d04a34c3f4ebdfccc7bPatch, Third Party Advisory
- https://huntr.dev/bounties/0be32e6b-7c48-43f0-9cec-433000ad8f64Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/bookstackapp/bookstack/commit/43830a372fc51a8793199d04a34c3f4ebdfccc7bPatch, Third Party Advisory
- https://huntr.dev/bounties/0be32e6b-7c48-43f0-9cec-433000ad8f64Exploit, Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3916?
bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
How severe is CVE-2021-3916?
CVE-2021-3916 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.20% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3916?
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.
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Are you affected by CVE-2021-3916?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST