QSearchQSearch

CVE-2021-3767

5.4 MEDIUM

bookstack is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Published: 2021-09-06 · Last updated: 2026-06-17

Severity and scoring

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

Affected products

VendorProduct
bookstackappbookstack

Description

bookstack is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Source: NVD

References

Related CVEs

Same vendor

  • CVE-2021-3906 — bookstack is vulnerable to Unrestricted Upload of File with Dangerous Type (6.5 MEDIUM)
  • CVE-2021-3874 — bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (6.5 MEDIUM)
  • CVE-2021-3768 — bookstack is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (5.4 MEDIUM)
  • CVE-2021-3758 — bookstack is vulnerable to Server-Side Request Forgery (SSRF) (6.5 MEDIUM)

Same CWE

  • CVE-2026-12425 — Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in PowerSchool Employee Access ...
  • CVE-2024-30476 — PowerStore contains a Stored Cross-Site Scripting Vulnerability in the PowerStore Manager (5.4 MEDIUM)
  • CVE-2026-54198 — Unauthenticated Cross Site Scripting (XSS) in Media LIbrary Assistant <= 3.35 versions (7.1 HIGH)
  • CVE-2026-54191 — Unauthenticated Cross Site Scripting (XSS) in Pods <= 3.3.8 versions (7.1 HIGH)
  • CVE-2026-39437 — Unauthenticated Cross Site Scripting (XSS) in Min Max Step Quantity Limits Manager for WooCommerce <= 5.2.2 versions (7.1 HIGH)