9

CVE-2020-5256

Remote Code Execution Through Image Uploads in BookStack

BookStack before version 0.25.5 has a vulnerability where a user could upload PHP files through image upload functions, which would allow them to execute code on the host system remotely. They would then have the permissions of the PHP process. This most impacts scenarios where non-trusted users are given permission to upload images in any area of the application. The issue was addressed in a series of patches in versions 0.25.3, 0.25.4 and 0.25.5. Users should upgrade to at least v0.25.5 to avoid this vulnerability.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Bookstackapp ≫ Bookstack Version < 0.25.3
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.95% 0.776
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 8.8 2.8 5.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvd@nist.gov 9 8 10
AV:N/AC:L/Au:S/C:C/I:C/A:C
security-advisories@github.com 7.9 1.3 6
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:L
CWE-434 Unrestricted Upload of File with Dangerous Type

The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes code syntax before using the input in a dynamic evaluation call (e.g. "eval").

https://github.com/BookStackApp/BookStack/releases/tag/v0.25.3
Release Notes
https://github.com/BookStackApp/BookStack/releases/tag/v0.25.4
Release Notes
https://github.com/BookStackApp/BookStack/releases/tag/v0.25.5
Release Notes
https://github.com/BookStackApp/BookStack/security/advisories/GHSA-g9rq-x4fj-f5hx
Third Party Advisory