How severe is CVE-2015-6939?

CVE-2015-6939 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2015-6939 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6939?

CVE-2015-6939 primarily affects Joomla Joomla!. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-6939?

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

When was CVE-2015-6939 published?

CVE-2015-6939 was published on 2015-09-18 and last updated on 2026-06-17.

CVE-2015-6939

CVE-2015-6939 is a medium-severity vulnerability in Joomla Joomla! 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. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Joomla Joomla!
Published: 2015-09-18
Last modified: 2026-06-17

Description

Cross-site scripting (XSS) vulnerability in the login module in Joomla! 3.4.x before 3.4.4 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Frequently asked questions

What is CVE-2015-6939?: Cross-site scripting (XSS) vulnerability in the login module in Joomla! 3.4.x before 3.4.4 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
How severe is CVE-2015-6939?: CVE-2015-6939 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2015-6939 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6939?: CVE-2015-6939 primarily affects Joomla Joomla!. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-6939?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-6939 published?: CVE-2015-6939 was published on 2015-09-18 and last updated on 2026-06-17.

References

Affected products (12)

cpe:2.3:a:joomla:joomla\!:3.4.0:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.4.0:alpha:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.4.0:beta1:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.4.0:beta2:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.4.0:beta3:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.4.0:rc1:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.4.1:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.4.1:rc1:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.4.1:rc2:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.4.2:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.4.2:rc1:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.4.3:*:*:*:*:*:*:*

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