CVE-2020-5256
High
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.
SeverityHigh
CVSS7.9
Exploit probability—
Product
Bookstack
PublishedMar 9, 2020
First seenMar 9, 2020
Weakness typeCWE-95CWE-95
How to fix
Update
- bookstackapp bookstack0.25.3 or later
- ssddanbrown/bookstack0.25.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| bookstackapp bookstack | v < 0.25.3 | 0.25.3 |
| ssddanbrown/bookstackPackagist | v < 0.25.5 | 0.25.5 |
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