CVE-2020-5256: Remote Code Execution Through Image Uploads in BookStack

CVE-2020-5256 · Severity: low · CVSS 3.1 · Published 2020-03-13

Remote Code Execution Through Image Uploads in BookStack

Technologies: ssddanbrown/bookstack (Packagist). Vendors: Packagist.

Quick answers

Is CVE-2020-5256 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2020-5256 being exploited in the wild.
How severe is CVE-2020-5256?
Low severity, with a CVSS score of 3.1, published 13 March 2020.
Which products and versions are affected?
ssddanbrown/bookstack (Packagist) ECOSYSTEM:introduced=0,fixed=0.25.5.
Is there a fix for CVE-2020-5256?
Yes. ssddanbrown/bookstack (Packagist): upgrade to 0.25.5 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2020-5256?
Check whether you run ssddanbrown/bookstack (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • ssddanbrown/bookstack (Packagist): upgrade to 0.25.5 or later
    composer require ssddanbrown/bookstack:^0.25.5

Affected products

  • ssddanbrown/bookstack (Packagist) ECOSYSTEM:introduced=0,fixed=0.25.5

Identifiers

  • CVE-2020-5256
  • GHSA-g9rq-x4fj-f5hx

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