How severe is CVE-2015-6670?

CVE-2015-6670 has a CVSS 2.0 base score of 4.0, rated medium severity.

Is CVE-2015-6670 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-6670?

CVE-2015-6670 primarily affects Owncloud Owncloud Server. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-6670?

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

When was CVE-2015-6670 published?

CVE-2015-6670 was published on 2015-10-26 and last updated on 2026-06-17.

CVE-2015-6670

CVE-2015-6670 is a medium-severity vulnerability in Owncloud Owncloud Server with a CVSS 2.0 base score of 4.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 4.0)
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Owncloud Owncloud Server
Published: 2015-10-26
Last modified: 2026-06-17

Description

ownCloud Server before 7.0.8, 8.0.x before 8.0.6, and 8.1.x before 8.1.1 does not properly check ownership of calendars, which allows remote authenticated users to read arbitrary calendars via the calid parameter to apps/calendar/export.php.

Frequently asked questions

What is CVE-2015-6670?: ownCloud Server before 7.0.8, 8.0.x before 8.0.6, and 8.1.x before 8.1.1 does not properly check ownership of calendars, which allows remote authenticated users to read arbitrary calendars via the calid parameter to apps/calendar/export.php.
How severe is CVE-2015-6670?: CVE-2015-6670 has a CVSS 2.0 base score of 4.0, rated medium severity.
Is CVE-2015-6670 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-6670?: CVE-2015-6670 primarily affects Owncloud Owncloud Server. In total, 14 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-6670?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-6670 published?: CVE-2015-6670 was published on 2015-10-26 and last updated on 2026-06-17.

References

Affected products (14)

cpe:2.3:a:owncloud:owncloud_server:7.0.0:*:*:*:*:*:*:*
cpe:2.3:a:owncloud:owncloud_server:7.0.1:*:*:*:*:*:*:*
cpe:2.3:a:owncloud:owncloud_server:7.0.2:*:*:*:*:*:*:*
cpe:2.3:a:owncloud:owncloud_server:7.0.3:*:*:*:*:*:*:*
cpe:2.3:a:owncloud:owncloud_server:7.0.4:*:*:*:*:*:*:*
cpe:2.3:a:owncloud:owncloud_server:7.0.5:*:*:*:*:*:*:*
cpe:2.3:a:owncloud:owncloud_server:7.0.6:*:*:*:*:*:*:*
cpe:2.3:a:owncloud:owncloud_server:7.0.7:*:*:*:*:*:*:*
cpe:2.3:a:owncloud:owncloud_server:8.0.0:*:*:*:*:*:*:*
cpe:2.3:a:owncloud:owncloud_server:8.0.2:*:*:*:*:*:*:*
cpe:2.3:a:owncloud:owncloud_server:8.0.3:*:*:*:*:*:*:*
cpe:2.3:a:owncloud:owncloud_server:8.0.4:*:*:*:*:*:*:*
cpe:2.3:a:owncloud:owncloud_server:8.0.5:*:*:*:*:*:*:*
cpe:2.3:a:owncloud:owncloud_server:8.1.0:*:*:*:*:*:*:*

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