CVE-2026-45543

mediumpriority · track · 0EPSS 0.003 · 19 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.27% (19th) EPSS

CVSS 5.3 · medium

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

5.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · ENISA EU

v3.15.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · security-advisories@github.comexploitability 3.9 · impact 1.4

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-552US

affected products (4)

Products and version ranges known to be affected.

Nextcloud Nextcloud Forms <5.2.7all versionscert_bundDE
nextcloud nextcloud≤ Forms <5.2.7cert_bundDE
nextcloud security-advisories4.3.0, → 5.2.7enisa_euvdEU
nextcloud forms4.3.0 → 5.2.7nvdUScpe:2.3:a:nextcloud:forms:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1517Nextcloud: Mehrere SchwachstellenDeutsch2026-05-12csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Nextcloud ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um Informationen offenzulegen, und um einen SQL-Injection Angriff durchzuführen.

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2026-06-01modified 2026-07-22

references (10)

External citations — patches, advisories, analysis.

scry

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