CVE•Published 2026-06-01•Modified 2026-06-04•0 articles on news•5 live references•NVD data

CVE-2026-45543Nextcloud · Forms

Vulnerability data via NVD (ingested)

CVSS v3.1

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS percentile

Exploit Prediction Scoring System · top 92% of all CVEs

Weaknesses (CWE)

CWE-552Files or Directories Accessible to External Parties

Description

Nextcloud is an open source content collaboration platform. From version 4.3.0 to before version 5.2.7, a removed collaborator retains unauthorized read access to uploaded respondent files for the affected form. The scope is limited to uploaded files for forms where that user previously had results access. This issue has been patched in version 5.2.7.

Timeline

Published 2026-06-01

Modified 2026-06-04

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-45543

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Nextcloud Forms"

All exposed Nextcloud Forms instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Forms"

HTTP body or banner mentions "Forms" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-45543