What’s Vulnerable › Vulnerabilities

CVE-2025-66027: Rallly Information Disclosure Vulnerability in Participant API Leaks Names and Emails Despite Pro Privacy Settings

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-11-29 · updated 2026-10-07
• Weakness: CWE-200

Description

Rallly is an open-source scheduling and collaboration tool. Prior to version 4.5.6, an information disclosure vulnerability exposes participant details, including names and email addresses through the /api/trpc/polls.get,polls.participants.list endpoint, even when Pro privacy features are enabled. This bypasses intended privacy controls that should prevent participants from viewing other users’ personal information. This issue has been patched in version 4.5.6.

Affected products

• lukevella rallly: before 4.5.6 — fixed in 4.5.6

How to fix

Upgrade to a fixed version: lukevella rallly 4.5.6. Check the vendor advisory for mitigations.

References

• https://github.com/lukevella/rallly/commit/59738c04f9a8ec25f0af5ce20ad0eab6cf134963
• https://github.com/lukevella/rallly/releases/tag/v4.5.6
• https://github.com/lukevella/rallly/security/advisories/GHSA-65wg-8xgw-f3fg
• https://github.com/lukevella/rallly/security/advisories/GHSA-65wg-8xgw-f3fg

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