How severe is CVE-2021-35947?

CVE-2021-35947 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-2021-35947 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35947?

CVE-2021-35947 affects Owncloud. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-35947?

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

When was CVE-2021-35947 published?

CVE-2021-35947 was published on 2021-09-07 and last updated on 2026-06-17.

CVE-2021-35947

CVE-2021-35947 is a medium-severity vulnerability in Owncloud 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-209.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-209
Affected product: Owncloud
Published: 2021-09-07
Last modified: 2026-06-17

Description

The public share controller in the ownCloud server before version 10.8.0 allows a remote attacker to see the internal path and the username of a public share by including invalid characters in the URL.

Frequently asked questions

What is CVE-2021-35947?: The public share controller in the ownCloud server before version 10.8.0 allows a remote attacker to see the internal path and the username of a public share by including invalid characters in the URL.
How severe is CVE-2021-35947?: CVE-2021-35947 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-2021-35947 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35947?: CVE-2021-35947 affects Owncloud. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-35947?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-35947 published?: CVE-2021-35947 was published on 2021-09-07 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:owncloud:owncloud:*:*:*:*:*:*:*:*

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