How severe is CVE-2013-4331?

CVE-2013-4331 has a CVSS 2.0 base score of 2.1, rated low severity.

Is CVE-2013-4331 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4331?

CVE-2013-4331 primarily affects Robert Ancell Lightdm. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4331?

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

When was CVE-2013-4331 published?

CVE-2013-4331 was published on 2014-02-02 and last updated on 2026-06-16.

CVE-2013-4331

CVE-2013-4331 is a low-severity vulnerability in Robert Ancell Lightdm with a CVSS 2.0 base score of 2.1. 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 2.1)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Robert Ancell Lightdm
Published: 2014-02-02
Last modified: 2026-06-16

Description

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 permissions for the temporary .Xauthority file, which allows local users to obtain sensitive information by reading the file.

Frequently asked questions

What is CVE-2013-4331?: 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 permissions for the temporary .Xauthority file, which allows local users to obtain sensitive information by reading the file.
How severe is CVE-2013-4331?: CVE-2013-4331 has a CVSS 2.0 base score of 2.1, rated low severity.
Is CVE-2013-4331 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4331?: CVE-2013-4331 primarily affects Robert Ancell Lightdm. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4331?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-4331 published?: CVE-2013-4331 was published on 2014-02-02 and last updated on 2026-06-16.

References

https://bugs.launchpad.net/lightdm/%2Bbug/685212

Affected products (19)

cpe:2.3:a:robert_ancell:lightdm:1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.4.1:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.4.2:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.6.0:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.6.1:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.0:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.1:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.2:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.3:*:*:*:*:*:*:*
cpe:2.3:a:robert_ancell:lightdm:1.7.4:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*

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-2013-4459 — Low (CVSS 3.3): 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…
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-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.

All CVEs affecting Robert Ancell Lightdm →

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