CVE-2020-26260

Server Side Request Forgery in BookStack

MEDIUM
6.4
CVSS Score
Published: December 9, 2020 at 04:20 PM UTC
Updated: June 17, 2026 at 03:07 AM UTC
1 product affected across 1 vendorBookStack

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Severity
MEDIUM6.4
Exploit prediction
EPSS 0.8%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 0.30.5
Affected range stops below 0.30.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

6.4MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-74

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