CVE Feed

    Dashboard / CVE / CVE-2020-26260

    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.

    Published:Dec 9, 2020
    Last Modified:Nov 21, 2024
    EPS:Dec 9, 2020
    EPSS Score:0.00308
    CVSS Score:6.4

    Affected Products

    Vendor
    Bookstackapp
    Product
    Bookstack

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-101 Server Side Include (SSI) Injection
    CAPEC-105 HTTP Request Splitting
    CAPEC-108 Command Line Execution through SQL Injection
    CAPEC-120 Double Encoding
    CAPEC-13 Subverting Environment Variable Values
    CAPEC-135 Format String Injection
    CAPEC-14 Client-side Injection-induced Buffer Overflow
    CAPEC-24 Filter Failure through Buffer Overflow
    CAPEC-250 XML Injection
    CAPEC-267 Leverage Alternate Encoding
    CAPEC-273 HTTP Response Smuggling
    CAPEC-28 Fuzzing
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-34 HTTP Response Splitting
    CAPEC-42 MIME Conversion
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-46 Overflow Variables and Tags
    CAPEC-47 Buffer Overflow via Parameter Expansion
    CAPEC-51 Poison Web Service Registry
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-6 Argument Injection
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-67 String Format Overflow in syslog()
    CAPEC-7 Blind SQL Injection
    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic
    CAPEC-72 URL Encoding
    CAPEC-76 Manipulating Web Input to File System Calls
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-8 Buffer Overflow in an API Call
    CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic
    CAPEC-83 XPath Injection
    CAPEC-84 XQuery Injection
    CAPEC-9 Buffer Overflow in Local Command-Line Utilities

    Related CVEs

    CVE-2026-84695 (CVSS 9.3) — BookStack before 26.05.4 contains a stored cross-site scripting vulnerability in the drawing upload endpoint t…
    CVE-2026-82450 (CVSS 8.7) — BookStack before 26.05.4 contains a remote code execution vulnerability in the portable ZIP import functionali…
    CVE-2026-67204 (CVSS 5.3) — BookStack before 26.05.4 contains a broken access control vulnerability that allows authenticated API users wi…
    CVE-2026-5484 (CVSS 5.5) — A weakness has been identified in BookStackApp BookStack up to 26.03. Affected is the function chapterToMarkdo…
    CVE-2023-6199 (CVSS 6.5) — Book Stack version 23.10.2 allows filtering local files on the server. This is possible because the applicatio…
    CVE-2023-4624 (CVSS 2.4) — Server-Side Request Forgery (SSRF) in GitHub repository bookstackapp/bookstack prior to v23.08.…
    CVE-2022-40690 (CVSS 5.4) — Cross-site scripting vulnerability in BookStack versions prior to v22.09 allows a remote authenticated attacke…
    CVE-2022-0877 (CVSS 5.4) — Cross-site Scripting (XSS) - Stored in GitHub repository bookstackapp/bookstack prior to v22.02.3.…
    CVE-2021-4194 (CVSS 6.5) — bookstack is vulnerable to Improper Access Control…
    CVE-2021-4119 (CVSS 9.8) — bookstack is vulnerable to Improper Access Control…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High