CVE-2013-4520

Exp

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.

Published: 2013-12-14 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-4520 is rated High Exploit Risk (61.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.36%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2013-4520

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2013-4520

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.43% 2.36% +0.93%
2 2025-07-13 0.87% 1.43% +0.56%
3 2025-07-12 — 0.87% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-4520

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2013-4520

OS Trackers for CVE-2013-4520

vendor priority summary link
debian unimportant CVE-2013-4520 unimportant priority: Debian including 1 source packages (libxslt), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2013-4520
gentoo normal CVE-2013-4520: 1 GLSA(s) (201401-07), 1 atom(s) (dev-libs/libxslt); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-4520
redhat medium — https://access.redhat.com/security/cve/CVE-2013-4520
ubuntu low CVE-2013-4520 low priority: Ubuntu including 1 source packages (libxslt), 6 status rows across 6 suites (lucid, precise, quantal, raring, saucy, upstream): not-affected 5, released 1. https://ubuntu.com/security/CVE-2013-4520

Affected software / configurations for CVE-2013-4520

Vendor Product Version Raw CPE
xmlsoft libxslt <= 1.1.24 cpe:2.3:a:xmlsoft:libxslt:*:*:*:*:*:*:*:*
xmlsoft libxslt 0.0.1 cpe:2.3:a:xmlsoft:libxslt:0.0.1:*:*:*:*:*:*:*
xmlsoft libxslt 0.1.0 cpe:2.3:a:xmlsoft:libxslt:0.1.0:*:*:*:*:*:*:*
xmlsoft libxslt 0.2.0 cpe:2.3:a:xmlsoft:libxslt:0.2.0:*:*:*:*:*:*:*
xmlsoft libxslt 0.3.0 cpe:2.3:a:xmlsoft:libxslt:0.3.0:*:*:*:*:*:*:*
xmlsoft libxslt 0.4.0 cpe:2.3:a:xmlsoft:libxslt:0.4.0:*:*:*:*:*:*:*
xmlsoft libxslt 0.5.0 cpe:2.3:a:xmlsoft:libxslt:0.5.0:*:*:*:*:*:*:*
xmlsoft libxslt 0.6.0 cpe:2.3:a:xmlsoft:libxslt:0.6.0:*:*:*:*:*:*:*
xmlsoft libxslt 0.7.0 cpe:2.3:a:xmlsoft:libxslt:0.7.0:*:*:*:*:*:*:*
xmlsoft libxslt 0.8.0 cpe:2.3:a:xmlsoft:libxslt:0.8.0:*:*:*:*:*:*:*
xmlsoft libxslt 0.9.0 cpe:2.3:a:xmlsoft:libxslt:0.9.0:*:*:*:*:*:*:*
xmlsoft libxslt 0.10.0 cpe:2.3:a:xmlsoft:libxslt:0.10.0:*:*:*:*:*:*:*
xmlsoft libxslt 0.11.0 cpe:2.3:a:xmlsoft:libxslt:0.11.0:*:*:*:*:*:*:*
xmlsoft libxslt 0.12.0 cpe:2.3:a:xmlsoft:libxslt:0.12.0:*:*:*:*:*:*:*
xmlsoft libxslt 0.13.0 cpe:2.3:a:xmlsoft:libxslt:0.13.0:*:*:*:*:*:*:*
xmlsoft libxslt 0.14.0 cpe:2.3:a:xmlsoft:libxslt:0.14.0:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.0 cpe:2.3:a:xmlsoft:libxslt:1.0.0:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.1 cpe:2.3:a:xmlsoft:libxslt:1.0.1:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.2 cpe:2.3:a:xmlsoft:libxslt:1.0.2:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.3 cpe:2.3:a:xmlsoft:libxslt:1.0.3:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.4 cpe:2.3:a:xmlsoft:libxslt:1.0.4:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.5 cpe:2.3:a:xmlsoft:libxslt:1.0.5:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.6 cpe:2.3:a:xmlsoft:libxslt:1.0.6:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.7 cpe:2.3:a:xmlsoft:libxslt:1.0.7:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.8 cpe:2.3:a:xmlsoft:libxslt:1.0.8:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.9 cpe:2.3:a:xmlsoft:libxslt:1.0.9:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.10 cpe:2.3:a:xmlsoft:libxslt:1.0.10:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.11 cpe:2.3:a:xmlsoft:libxslt:1.0.11:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.12 cpe:2.3:a:xmlsoft:libxslt:1.0.12:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.13 cpe:2.3:a:xmlsoft:libxslt:1.0.13:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.14 cpe:2.3:a:xmlsoft:libxslt:1.0.14:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.15 cpe:2.3:a:xmlsoft:libxslt:1.0.15:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.16 cpe:2.3:a:xmlsoft:libxslt:1.0.16:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.17 cpe:2.3:a:xmlsoft:libxslt:1.0.17:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.18 cpe:2.3:a:xmlsoft:libxslt:1.0.18:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.19 cpe:2.3:a:xmlsoft:libxslt:1.0.19:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.20 cpe:2.3:a:xmlsoft:libxslt:1.0.20:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.21 cpe:2.3:a:xmlsoft:libxslt:1.0.21:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.22 cpe:2.3:a:xmlsoft:libxslt:1.0.22:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.23 cpe:2.3:a:xmlsoft:libxslt:1.0.23:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.24 cpe:2.3:a:xmlsoft:libxslt:1.0.24:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.25 cpe:2.3:a:xmlsoft:libxslt:1.0.25:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.26 cpe:2.3:a:xmlsoft:libxslt:1.0.26:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.27 cpe:2.3:a:xmlsoft:libxslt:1.0.27:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.28 cpe:2.3:a:xmlsoft:libxslt:1.0.28:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.29 cpe:2.3:a:xmlsoft:libxslt:1.0.29:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.30 cpe:2.3:a:xmlsoft:libxslt:1.0.30:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.31 cpe:2.3:a:xmlsoft:libxslt:1.0.31:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.32 cpe:2.3:a:xmlsoft:libxslt:1.0.32:*:*:*:*:*:*:*
xmlsoft libxslt 1.0.33 cpe:2.3:a:xmlsoft:libxslt:1.0.33:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.0 cpe:2.3:a:xmlsoft:libxslt:1.1.0:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.1 cpe:2.3:a:xmlsoft:libxslt:1.1.1:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.2 cpe:2.3:a:xmlsoft:libxslt:1.1.2:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.3 cpe:2.3:a:xmlsoft:libxslt:1.1.3:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.4 cpe:2.3:a:xmlsoft:libxslt:1.1.4:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.5 cpe:2.3:a:xmlsoft:libxslt:1.1.5:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.6 cpe:2.3:a:xmlsoft:libxslt:1.1.6:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.7 cpe:2.3:a:xmlsoft:libxslt:1.1.7:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.8 cpe:2.3:a:xmlsoft:libxslt:1.1.8:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.9 cpe:2.3:a:xmlsoft:libxslt:1.1.9:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.10 cpe:2.3:a:xmlsoft:libxslt:1.1.10:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.11 cpe:2.3:a:xmlsoft:libxslt:1.1.11:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.12 cpe:2.3:a:xmlsoft:libxslt:1.1.12:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.13 cpe:2.3:a:xmlsoft:libxslt:1.1.13:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.14 cpe:2.3:a:xmlsoft:libxslt:1.1.14:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.15 cpe:2.3:a:xmlsoft:libxslt:1.1.15:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.16 cpe:2.3:a:xmlsoft:libxslt:1.1.16:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.17 cpe:2.3:a:xmlsoft:libxslt:1.1.17:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.18 cpe:2.3:a:xmlsoft:libxslt:1.1.18:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.19 cpe:2.3:a:xmlsoft:libxslt:1.1.19:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.20 cpe:2.3:a:xmlsoft:libxslt:1.1.20:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.21 cpe:2.3:a:xmlsoft:libxslt:1.1.21:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.22 cpe:2.3:a:xmlsoft:libxslt:1.1.22:*:*:*:*:*:*:*
xmlsoft libxslt 1.1.23 cpe:2.3:a:xmlsoft:libxslt:1.1.23:*:*:*:*:*:*:*

References for CVE-2013-4520

cvelogic Threat Intelligence