Reflected XSS Vulnerability in Sickbeard by Project Discovery
CVE-2020-37284

5.1MEDIUM

Key Information:

Vendor

Midgetspy

Status
Sickbeard
Vendor
CVE Published:
22 October 2026

What is CVE-2020-37284?

Sickbeard build-507 contains a reflected cross-site scripting vulnerability, allowing unauthenticated attackers to inject malicious scripts via the 'pattern' parameter in the /config/postProcessing/testNaming endpoint. Attackers can manipulate GET requests with harmful SVG onload payloads that are returned unescaped by the testNaming handler. This vulnerability enables the execution of arbitrary JavaScript in the browsers of unsuspecting victims, significantly compromising user security. Exploitation instances were noted by the Shadowserver Foundation recently, highlighting the need for immediate attention from users and administrators.

Affected Version(s)

Sickbeard 0

References

https://github.com/projectdiscovery/nuclei-templates/blob...
technical-description
https://www.vulncheck.com/advisories/sickbeard-build-507-...
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

The Shadowserver Foundation
.