What is the CVSS score of CVE-2021-3271?

CVE-2021-3271 has a CVSS 3.1 base score of 4.8 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.9%.

Is there a public PoC exploit available for CVE-2021-3271?

Yes, a public proof-of-concept exploit is available for CVE-2021-3271. Prioritise patching immediately. EPSS: 0.9%.

Is there a patch available for CVE-2021-3271?

Yes, a patch is available for CVE-2021-3271. Update the affected software to the latest version immediately.

Pressbooks CVE-2021-3271

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2021-02-18 cve@mitre.org

XSS Pressbooks

4.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

4.8 MEDIUM

AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

CVE Published

Feb 18, 2021 - 19:15 nvd

MEDIUM 4.8

DescriptionNVD

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.

AnalysisAI

PressBooks 5.17.3 contains a cross-site scripting (XSS). Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. 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. Affected products include: Pressbooks.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.