How severe is CVE-2013-4459?

CVE-2013-4459 has a CVSS 2.0 base score of 3.3, rated low severity.

Is CVE-2013-4459 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4459?

CVE-2013-4459 primarily affects Robert Ancell Lightdm. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4459?

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

When was CVE-2013-4459 published?

CVE-2013-4459 was published on 2013-11-23 and last updated on 2026-06-16.

CVE-2013-4459

CVE-2013-4459 is a low-severity vulnerability in Robert Ancell Lightdm with a CVSS 2.0 base score of 3.3. 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-264.

Key facts

Severity: Low (CVSS 2.0 base score 3.3)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Robert Ancell Lightdm
Published: 2013-11-23
Last modified: 2026-06-16

Description

LightDM 1.7.5 through 1.8.3 and 1.9.x before 1.9.2 does not apply the AppArmor profile to the Guest account, which allows local users to bypass intended restrictions by leveraging the Guest account.

Frequently asked questions

What is CVE-2013-4459?: LightDM 1.7.5 through 1.8.3 and 1.9.x before 1.9.2 does not apply the AppArmor profile to the Guest account, which allows local users to bypass intended restrictions by leveraging the Guest account.
How severe is CVE-2013-4459?: CVE-2013-4459 has a CVSS 2.0 base score of 3.3, rated low severity.
Is CVE-2013-4459 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4459?: CVE-2013-4459 primarily affects Robert Ancell Lightdm. In total, 21 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4459?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4459 published?: CVE-2013-4459 was published on 2013-11-23 and last updated on 2026-06-16.

References

Affected products (21)

cpe:2.3:a:robert_ancell:lightdm:1.7.5:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.6:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.7:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.8:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.9:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.10:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.11:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.12:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.13:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.14:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.15:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.16:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.17:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.18:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.8.0:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.8.1:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.8.2:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.8.3:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.9.0:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.9.1:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:13.10:*:*:*:*:*:*:*

More vulnerabilities in Robert Ancell Lightdm

CVE-2012-1111 — Medium (CVSS 4.6): lightdm before 1.0.9 does not properly close file descriptors before opening a child process, which allows local users…
CVE-2012-0943 — Low (CVSS 2.1): debian/guest-account in Light Display Manager (lightdm) 1.0.x before 1.0.6 and 1.1.x before 1.1.7, as used in Ubuntu…
CVE-2013-4331 — Low (CVSS 2.1): Light Display Manager (aka LightDM) 1.4.x before 1.4.3, 1.6.x before 1.6.2, and 1.7.x before 1.7.14 uses 0664…
CVE-2011-3153 — Low (CVSS 1.9): dmrc.c in Light Display Manager (aka LightDM) before 1.1.1 allows local users to read arbitrary files via a symlink…
CVE-2011-4105 — Low (CVSS 1.9): LightDM before 1.0.6 allows local users to change ownership of arbitrary files via a symlink attack on ~/.Xauthority.

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