CVE-2021-3271

4.8 MEDIUM

PressBooks 5.17.3 contains a cross-site scripting (XSS)

Published: 2021-02-18 · Last updated: 2026-06-17

Severity and scoring

CVSS: 4.8 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
CWE: CWE-79

Affected products

Vendor	Product
pressbooks	pressbooks

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-3271
[Other]https://github.com/pressbooks/pressbooks
[Exploit reference]https://github.com/pressbooks/pressbooks/pull/2072
[Exploit reference]https://www.gosecure.net/blog/2021/02/16/cve-2021-3271-pressbooks-stored-cross-site-scripting-proof-of-concept/
[Other]https://github.com/pressbooks/pressbooks
[Exploit reference]https://github.com/pressbooks/pressbooks/pull/2072
[Exploit reference]https://www.gosecure.net/blog/2021/02/16/cve-2021-3271-pressbooks-stored-cross-site-scripting-proof-of-concept/

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