CVE-2023-25160

IDOR Vulnerability in Nextcloud Mail

MEDIUM

5.3

CVSS Score

Published: February 13, 2023 at 08:19 PM UTC

Updated: June 17, 2026 at 05:40 AM UTC

1 product affected across 1 vendorMail

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Severity

MEDIUM5.3

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

Description

Nextcloud Mail is an email app for the Nextcloud home server platform. Prior to versions 2.2.1, 1.14.5, 1.12.9, and 1.11.8, an attacker can access the mail box by ID getting the subjects and the first characters of the emails. Users should upgrade to Mail 2.2.1 for Nextcloud 25, Mail 1.14.5 for Nextcloud 22-24, Mail 1.12.9 for Nextcloud 21, or Mail 1.11.8 for Nextcloud 20 to receive a patch. No known workarounds are available.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Mail · Nextcloudnextcloud-app

95%

v < 1.11.81.12.0 ≤ v < 1.12.91.13.0 ≤ v < 1.14.52.0.0 ≤ v < 2.2.1

Affected range stops below 1.11.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.12.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.14.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.2.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_MISCPatch

Source: [email protected]

https://github.com/nextcloud/mail/pull/7740

x_refsource_CONFIRMVendor Advisory

Source: [email protected]

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-m45f-r5gh-h6cx

x_refsource_MISCPermissions RequiredThird Party Advisory

Source: [email protected]

https://hackerone.com/reports/1784681

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: LOW
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-639

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