How severe is CVE-2025-66553?

CVE-2025-66553 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2025-66553 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66553?

CVE-2025-66553 affects Nextcloud Tables. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66553?

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

Does CVE-2025-66553 have an EU (EUVD) identifier?

Yes. CVE-2025-66553 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201430.

When was CVE-2025-66553 published?

CVE-2025-66553 was published on 2025-12-05 and last updated on 2026-06-17.

CVE-2025-66553

CVE-2025-66553 is a medium-severity vulnerability in Nextcloud Tables with a CVSS 3.x base score of 4.3. 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-639.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-201430
Weakness: CWE-639
Affected product: Nextcloud Tables
Published: 2025-12-05
Last modified: 2026-06-17

Description

Nextcloud Tables allows you to create your own tables with individual columns. Prior to 0.8.7 and 0.9.4, authenticated users were able to view meta data of columns in other tables of the Tables app by modifying the numeric ID in a request. This vulnerability is fixed in 0.8.7 and 0.9.4.

Frequently asked questions

What is CVE-2025-66553?: Nextcloud Tables allows you to create your own tables with individual columns. Prior to 0.8.7 and 0.9.4, authenticated users were able to view meta data of columns in other tables of the Tables app by modifying the numeric ID in a request. This vulnerability is fixed in 0.8.7 and 0.9.4.
How severe is CVE-2025-66553?: CVE-2025-66553 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2025-66553 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66553?: CVE-2025-66553 affects Nextcloud Tables. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66553?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66553 have an EU (EUVD) identifier?: Yes. CVE-2025-66553 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201430.
When was CVE-2025-66553 published?: CVE-2025-66553 was published on 2025-12-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nextcloud:tables:*:*:*:*:*:nextcloud:*:*

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