CVE-2020-5256

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.

CVSS v3.0 8.8 HIGH
CVSS v2.0 9.0 HIGH

8.8^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:S/C:C/I:C/A:C

Exploitability : 8.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

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

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Configurations

Configuration 1 (hide)

cpe:2.3:a:bookstackapp:bookstack:*:*:*:*:*:*:*:*

Information

Published : 2020-03-09 09:15

Updated : 2020-03-10 06:34

NVD link : CVE-2020-5256

Mitre link : CVE-2020-5256

JSON object : View

CWE

CWE-434

Unrestricted Upload of File with Dangerous Type

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Products Affected

bookstackapp

bookstack

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