How severe is CVE-2015-8564?

CVE-2015-8564 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2015-8564 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-8564?

CVE-2015-8564 primarily affects Joomla Joomla!. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-8564?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2015-8564 published?

CVE-2015-8564 was published on 2015-12-16 and last updated on 2026-06-17.

CVE-2015-8564

CVE-2015-8564 is a high-severity vulnerability in Joomla Joomla! with a CVSS 2.0 base score of 7.5. 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: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Joomla Joomla!
Published: 2015-12-16
Last modified: 2026-06-17

Description

Directory traversal vulnerability in Joomla! 3.4.x before 3.4.6 allows remote attackers to have unspecified impact via directory traversal sequences in the XML install file in an extension package archive.

Frequently asked questions

What is CVE-2015-8564?: Directory traversal vulnerability in Joomla! 3.4.x before 3.4.6 allows remote attackers to have unspecified impact via directory traversal sequences in the XML install file in an extension package archive.
How severe is CVE-2015-8564?: CVE-2015-8564 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2015-8564 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-8564?: CVE-2015-8564 primarily affects Joomla Joomla!. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-8564?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2015-8564 published?: CVE-2015-8564 was published on 2015-12-16 and last updated on 2026-06-17.

References

https://developer.joomla.org/security-centre/634-20151214-core-directory-traversal.html

Affected products (5)

cpe:2.3:a:joomla:joomla\!:3.4.0:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.4.1:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.4.3:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.4.4:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.4.5:*:*:*:*:*:*:*

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