CVE-2021-3271
MEDIUMCVSS 4.8/10EPSS 0.93%
Last modified
CVE-2021-3271 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. PressBooks 5.17.3 contains a cross-site scripting (XSS). Stored XSS can be submitted via the Book Info's Long Description Body, and all actions to open or preview the books page will result in the triggering the stored XSS.. EPSS estimates a 0.93% chance of exploitation in the next 30 days.
Description
PressBooks 5.17.3 contains a cross-site scripting (XSS). Stored XSS can be submitted via the Book Info's Long Description Body, and all actions to open or preview the books page will result in the triggering the stored XSS.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Pressbooks | Pressbooks | <= 5.17.3 |
References
- https://github.com/pressbooks/pressbooksThird Party Advisory
- https://github.com/pressbooks/pressbooks/pull/2072Exploit, Third Party Advisory
- https://www.gosecure.net/blog/2021/02/16/cve-2021-3271-pressbooks-stored-cross-site-scripting-proof-of-concept/Exploit, Third Party Advisory
- https://github.com/pressbooks/pressbooksThird Party Advisory
- https://github.com/pressbooks/pressbooks/pull/2072Exploit, Third Party Advisory
- https://www.gosecure.net/blog/2021/02/16/cve-2021-3271-pressbooks-stored-cross-site-scripting-proof-of-concept/Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-3271?
PressBooks 5.17.3 contains a cross-site scripting (XSS). Stored XSS can be submitted via the Book Info's Long Description Body, and all actions to open or preview the books page will result in the triggering the stored XSS.
How severe is CVE-2021-3271?
CVE-2021-3271 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.93% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3271?
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-2021-3271?
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Scan your code nowSource: NVD / NIST