XSS in Bookstackapp Bookstack
CVE-2020-26211
In BookStack before version 0.30.4, a user with permissions to edit a page could insert JavaScript code through the use of `javascript:` URIs within a link or form which would run, within the context of the current page, when clicked or su…
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.004 (63.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N.
Affected products
- Bookstackapp Bookstack — versions < 0.30.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/BookStackApp/BookStack/releases/tag/v0.30.4 (x_refsource_MISC)
- github.com/BookStackApp/BookStack/security/advisories/GHSA-r2cf-8778-3jgp (x_refsource_CONFIRM)
- github.com/BookStackApp/BookStack/commit/bbd1384acbe7e52c21f89af69f2dc391c95dbf… (x_refsource_MISC)
- www.bookstackapp.com/blog/beta-release-v0-30-4/ (x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-26211?
- CVE-2020-26211 is a high-severity vulnerability in Bookstackapp Bookstack, classified under Cross-site Scripting. CVSS score: 7.7/10. Published 2020-11-03.
- How severe is CVE-2020-26211?
- High severity. CVSS v3 base score is 7.7 out of 10.
- Is CVE-2020-26211 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.