How severe is CVE-2020-8278?

CVE-2020-8278 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2020-8278 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8278?

CVE-2020-8278 affects Nextcloud Social. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-8278?

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

When was CVE-2020-8278 published?

CVE-2020-8278 was published on 2020-11-19 and last updated on 2026-06-17.

CVE-2020-8278

CVE-2020-8278 is a medium-severity vulnerability in Nextcloud Social with a CVSS 3.x base score of 5.3. 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-863.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Nextcloud Social
Published: 2020-11-19
Last modified: 2026-06-17

Description

Improper access control in Nextcloud Social app version 0.3.1 allowed to read posts of any user.

Frequently asked questions

What is CVE-2020-8278?: Improper access control in Nextcloud Social app version 0.3.1 allowed to read posts of any user.
How severe is CVE-2020-8278?: CVE-2020-8278 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2020-8278 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8278?: CVE-2020-8278 affects Nextcloud Social. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-8278?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-8278 published?: CVE-2020-8278 was published on 2020-11-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nextcloud:social:0.3.1:*:*:*:*:*:*:*

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