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TI-2023-26170 Aliases CVE-2023-48307

Nextcloud Mail app vulnerable to Server-Side Request Forgery

Priority MEDIUM 44CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

Nextcloud Mail is the mail app for Nextcloud, a self-hosted productivity platform. Starting in version 1.13.0 and prior to version 2.2.8 and 3.3.0, an attacker can use an unprotected endpoint in the Mail app to perform a SSRF attack. Nextcloud Mail app versions 2.2.8 and 3.3.0 contain a patch for this issue. As a workaround, disable the mail app.

Why it matters now

EPSS 0.00866 58th percentileScored 2026-11-07
Fix Fixed security-advisories (nextcloud): 2.2.8, 3.3.0

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
nextcloudsecurity-advisories1.13.0 to before 2.2.8; 3.1.0 to before 3.3.02.2.8, 3.3.0Patch availableCNA
  • security-advisories Vendornextcloud Affected 1.13.0 to before 2.2.8; 3.1.0 to before 3.3.0 Fixed in 2.2.8, 3.3.0 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nextcloud:mail:*:*:*:*:*:*:*:*1.13.0 to before 2.2.8; 3.0.0 to before 3.3.0Vulnerablenextcloud
  • cpe:2.3:a:nextcloud:mail:*:*:*:*:*:*:*:* Versions 1.13.0 to before 2.2.8; 3.0.0 to before 3.3.0 Vulnerable ·nextcloud

Remediation

  • Fix · CNA security-advisories (nextcloud) Fixed in 2.2.8, 3.3.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-48307

References

Patch 1

Advisory 1

Other 1

  • TI-2023-09741 Blind SSRF via server URL input in the Nextcloud Mail app CVSS 3.1MEDIUM 5.0
  • TI-2022-13176 Unauthenticated SSRF in 3rd party module "cerdic/csstidy" CVSS 3.1CRITICAL 9.8
  • TI-2021-12320 Missing permission check on email metadata retrieval CVSS 3.1HIGH 8.8
  • TI-2024-35179 Nextcloud Mail auto configurator can be tricked into sending account information to wrong servers CVSS 3.1HIGH 8.2
  • TI-2020-06574 A missing verification of the TLS host in Nextcloud Mail 1.1.3 allowed a man in the middle attack. CVSS 3.1HIGH 7.0
  • TI-2023-09742 Nexcloud Mail app temporarily stores cleartext password in database CVSS 3.1MEDIUM 6.5
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences