CVE-2013-4520

CVE-2013-4520 is a medium-severity vulnerability in Xmlsoft Libxslt with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

xslt.c in libxslt before 1.1.25 allows context-dependent attackers to cause a denial of service (crash) via a stylesheet that embeds a DTD, which causes a structure to be accessed as a different type. NOTE: this issue is due to an incomplete fix for CVE-2012-2825.

Frequently asked questions

What is CVE-2013-4520?
xslt.c in libxslt before 1.1.25 allows context-dependent attackers to cause a denial of service (crash) via a stylesheet that embeds a DTD, which causes a structure to be accessed as a different type. NOTE: this issue is due to an incomplete fix for CVE-2012-2825.
How severe is CVE-2013-4520?
CVE-2013-4520 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2013-4520 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4520?
CVE-2013-4520 primarily affects Xmlsoft Libxslt. In total, 74 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4520?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4520 published?
CVE-2013-4520 was published on 2013-12-14 and last updated on 2026-06-16.

References

Affected products (74)

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