CVEvulnerability

CVE-2020-5256

8.8 HIGH Published 2020-03-09 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-03-09
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.9 HIGH — CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:L
CVSS 3.1 ([email protected])
8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
9.0 HIGH — AV:N/AC:L/Au:S/C:C/I:C/A:C
Weaknesses
CWE-434, CWE-95

Description

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.

Affected configurations

• bookstackapp bookstack (< 0.25.3)

Related

Weakness · CWE (2)

  • CWE-434 Unrestricted Upload of File with Dangerous Type weakness
  • CWE-95 Improper Neutralization of Directives in Dynamically Evaluated Code weakness

References