How severe is CVE-2013-4549?

CVE-2013-4549 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2013-4549 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4549?

CVE-2013-4549 primarily affects Digia Qt. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4549?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-4549 published?

CVE-2013-4549 was published on 2013-12-23 and last updated on 2026-06-16.

CVE-2013-4549

CVE-2013-4549 is a medium-severity vulnerability in Digia Qt with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Digia Qt
Published: 2013-12-23
Last modified: 2026-06-16

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.

Frequently asked questions

What is 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 Expansion (XEE) attack.
How severe is CVE-2013-4549?: CVE-2013-4549 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2013-4549 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4549?: CVE-2013-4549 primarily affects Digia Qt. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4549?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4549 published?: CVE-2013-4549 was published on 2013-12-23 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:digia:qt:*:*:*:*:*:*:*:*
cpe:2.3:a:qt:qt:5.0.2:*:*:*:*:*:*:*

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