What’s Vulnerable › Vulnerabilities

CVE-2026-77352: Wallos: Authenticated SSRF via per-user SMTP notification host (low-privilege user)

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-31 · updated 2026-09-08
• Weakness: CWE-918

Description

Wallos is an open-source, self-hostable personal subscription tracker. From version 2.0.0 to before version 5.0.0, any authenticated Wallos user (no admin rights required) can make the server open arbitrary outbound SMTP connections to internal/link-local addresses, by setting the SMTP host of their personal email notifications to an internal IP. The per-user notification settings endpoint (endpoints/notifications/saveemailnotifications.php) performs no SSRF validation, and the notification cron (endpoints/cronjobs/sendnotifications.php) feeds that user-controlled host straight into PHPMailer ($mail->Host = $email['smtpAddress']). When the user's subscription notification fires, the server connects to the chosen host:port. This issue has been patched in version 5.0.0.

Affected products

• ellite Wallos: from 2.0.0, < 5.0.0

References

• https://github.com/ellite/Wallos/commit/11eaf402e841a628c68a805694227ce66c45f6f3
• https://github.com/ellite/Wallos/releases/tag/v5.0.0
• https://github.com/ellite/Wallos/security/advisories/GHSA-c75x-9vj6-57qj

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