What’s Vulnerable › Vulnerabilities

CVE-2021-32561

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-11 · updated 2026-06-17
• Weakness: CWE-79

Description

OctoPrint before 1.6.0 allows XSS because API error messages include the values of input parameters.

Affected products

• OctoPrint: before 1.6.0 — fixed in 1.6.0

How to fix

Upgrade to a fixed version: OctoPrint 1.6.0. Check the vendor advisory for mitigations.

References

• https://github.com/OctoPrint/OctoPrint/releases/tag/1.6.0
• https://octoprint.org/blog/2021/04/27/new-release-1.6.0/
• https://www.brzozowski.io/web-applications/2021/05/11/the-insecure-story-of-octoprint.html
• https://github.com/OctoPrint/OctoPrint/releases/tag/1.6.0
• https://octoprint.org/blog/2021/04/27/new-release-1.6.0/
• https://www.brzozowski.io/web-applications/2021/05/11/the-insecure-story-of-octoprint.html

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