How severe is CVE-2018-16463?

CVE-2018-16463 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-16463 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-16463?

CVE-2018-16463 primarily affects Nextcloud Nextcloud Server. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-16463?

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

When was CVE-2018-16463 published?

CVE-2018-16463 was published on 2018-10-30 and last updated on 2026-06-17.

CVE-2018-16463

CVE-2018-16463 is a low-severity vulnerability in Nextcloud Nextcloud Server with a CVSS 3.x base score of 3.1. 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-384.

Key facts

Severity: Low (CVSS 3.x base score 3.1)
CVSS v2: 3.6
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-384
Affected product: Nextcloud Nextcloud Server
Published: 2018-10-30
Last modified: 2026-06-17

Description

A bug causing session fixation in Nextcloud Server prior to 14.0.0, 13.0.3 and 12.0.8 could potentially allow an attacker to obtain access to password protected shares.

Frequently asked questions

What is CVE-2018-16463?: A bug causing session fixation in Nextcloud Server prior to 14.0.0, 13.0.3 and 12.0.8 could potentially allow an attacker to obtain access to password protected shares.
How severe is CVE-2018-16463?: CVE-2018-16463 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-16463 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-16463?: CVE-2018-16463 primarily affects Nextcloud Nextcloud Server. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-16463?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-16463 published?: CVE-2018-16463 was published on 2018-10-30 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*
cpe:2.3:a:nextcloud:nextcloud_server:14.0.0:beta1:*:*:*:*:*:*
cpe:2.3:a:nextcloud:nextcloud_server:14.0.0:beta2:*:*:*:*:*:*
cpe:2.3:a:nextcloud:nextcloud_server:14.0.0:beta3:*:*:*:*:*:*
cpe:2.3:a:nextcloud:nextcloud_server:14.0.0:beta4:*:*:*:*:*:*
cpe:2.3:a:nextcloud:nextcloud_server:14.0.0:rc1:*:*:*:*:*:*
cpe:2.3:a:nextcloud:nextcloud_server:14.0.0:rc2:*:*:*:*:*:*

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