CVE-2021-3767
MEDIUMCVSS 5.4/10EPSS 0.56%
Last modified
CVE-2021-3767 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. bookstack is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'). EPSS estimates a 0.56% chance of exploitation in the next 30 days.
Description
bookstack is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Bookstackapp | Bookstack | < 21.08.2 |
References
- https://github.com/bookstackapp/bookstack/commit/040997fdc4414776bcac06a3cbaac3b26b5e8a64Patch, Third Party Advisory
- https://huntr.dev/bounties/7ec92c85-30eb-4071-8891-6183446ca980Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/bookstackapp/bookstack/commit/040997fdc4414776bcac06a3cbaac3b26b5e8a64Patch, Third Party Advisory
- https://huntr.dev/bounties/7ec92c85-30eb-4071-8891-6183446ca980Exploit, Issue Tracking, Patch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3767?
bookstack is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
How severe is CVE-2021-3767?
CVE-2021-3767 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.56% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3767?
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-2021-37664TensorFlow is an end-to-end open source platform for machine…7.1
- CVE-2021-37665TensorFlow is an end-to-end open source platform for machine…7.8
- CVE-2021-37666TensorFlow is an end-to-end open source platform for machine…7.8
- CVE-2021-37667TensorFlow is an end-to-end open source platform for machine…7.8
- CVE-2021-37668TensorFlow is an end-to-end open source platform for machine…5.5
- CVE-2021-37669TensorFlow is an end-to-end open source platform for machine…5.5
- CVE-2021-37670TensorFlow is an end-to-end open source platform for machine…5.5
- CVE-2021-37671TensorFlow is an end-to-end open source platform for machine…7.8
- CVE-2021-37672TensorFlow is an end-to-end open source platform for machine…5.5
- CVE-2021-37673TensorFlow is an end-to-end open source platform for machine…5.5
- CVE-2021-37674TensorFlow is an end-to-end open source platform for machine…5.5
- CVE-2021-37675TensorFlow is an end-to-end open source platform for machine…5.5
Are you affected by CVE-2021-3767?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST