How severe is CVE-2023-35173?

CVE-2023-35173 has a CVSS 3.x base score of 5.7, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-35173 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-35173?

CVE-2023-35173 affects Nextcloud End-to-end Encryption. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-35173?

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

When was CVE-2023-35173 published?

CVE-2023-35173 was published on 2023-06-23 and last updated on 2026-06-17.

CVE-2023-35173

CVE-2023-35173 is a medium-severity vulnerability in Nextcloud End-to-end Encryption with a CVSS 3.x base score of 5.7. 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-284.

Key facts

Severity: Medium (CVSS 3.x base score 5.7)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Nextcloud End-to-end Encryption
Published: 2023-06-23
Last modified: 2026-06-17

Description

Nextcloud End-to-end encryption app provides all the necessary APIs to implement End-to-End encryption on the client side. By providing an invalid meta data file, an attacker can make previously dropped files inaccessible. It is recommended that the Nextcloud End-to-end encryption app is upgraded to version 1.12.4 that contains the fix.

Frequently asked questions

What is CVE-2023-35173?: Nextcloud End-to-end encryption app provides all the necessary APIs to implement End-to-End encryption on the client side. By providing an invalid meta data file, an attacker can make previously dropped files inaccessible. It is recommended that the Nextcloud End-to-end encryption app is upgraded to version 1.12.4 that contains the fix.
How severe is CVE-2023-35173?: CVE-2023-35173 has a CVSS 3.x base score of 5.7, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-35173 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-35173?: CVE-2023-35173 affects Nextcloud End-to-end Encryption. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-35173?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-35173 published?: CVE-2023-35173 was published on 2023-06-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nextcloud:end-to-end_encryption:*:*:*:*:*:*:*:*

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