CVE-2020-26260

BookStack is a platform for storing and organising information and documentation. In BookStack before version 0.30.5, a user with permissions to edit a page could set certain image URL's to manipulate functionality in the exporting system, which would allow them to make server side requests and/or have access to a wider scope of files within the BookStack file storage locations. The issue was addressed in BookStack v0.30.5. As a workaround, page edit permissions could be limited to only those that are trusted until you can upgrade.

• CWE-74
• CWE-74

• https://bookstackapp.com/blog/beta-release-v0-30-5/Vendor Advisory
• https://github.com/BookStackApp/BookStack/releases/tag/v0.30.5Release Notes, Third Party Advisory
• https://github.com/BookStackApp/BookStack/security/advisories/GHSA-8wfc-w2r5-x7crThird Party Advisory
• https://bookstackapp.com/blog/beta-release-v0-30-5/Vendor Advisory
• https://github.com/BookStackApp/BookStack/releases/tag/v0.30.5Release Notes, Third Party Advisory
• https://github.com/BookStackApp/BookStack/security/advisories/GHSA-8wfc-w2r5-x7crThird Party Advisory

Published

Dec 9, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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