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Fencer Intel
medium 5.0

CVE-2013-4549 json

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

published 2013-12-23 12 y ago modified 2026-06-16 4 mo ago also EUVD-2013-4408

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.0%
EPSS 3.0% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

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.

Patch / fix

  • qtbase-opensource-src Debian 14, Debian 13, Debian 12 5.1.1+dfsg-6

debian advisories DEBIAN-CVE-2013-4549

  • qt4-x11 Ubuntu 14.04 LTS 4:4.8.4+dfsg-0ubuntu20
  • qtbase-opensource-src Ubuntu 14.04 LTS 5.0.2+dfsg1-7ubuntu13
  • phantomjs Ubuntu Pro 14.04 LTS 1.9.0-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2013-4549

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • qt3 openSUSE Tumbleweed 3.3.8c-140.6

opensuse advisories openSUSE-SU-2024:10287-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2013-4549 updated cvss 4.3

QtXML: XML entity expansion denial of service

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.02% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.