CVE-2025-66027 - CVE House
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Status published High CVE-2025-66027

Rallly Information Disclosure Vulnerability in Participant API Leaks Names and Emails Despite Pro Privacy Settings

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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CVE-2025-65032
Rallly Has an IDOR Vulnerability in Participant Rename Function Allows Unauthorized Modification of Other Users’ Names
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CVE-2025-65031
Rallly Improper Authorization in Comment Endpoint Allows User Impersonation
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CVE-2025-65030
Rallly Improper Authorization in Comment Deletion Endpoint Allows Unauthorized Comment Removal
High 7.1

Affected Vendor

Affected Software

rallly
Vulnerable Versions:
< 4.5.6

Timeline

Official Publish: November 29th, 2025
Last Modified: December 1st, 2025
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-200 CWE-284 CWE-359

MITRE ATT&CK TTPs

T1213 Data from Information Repositories
Collection
T1005 Data from Local System
Collection
T1552 Unsecured Credentials
Credential Access
T1041 Exfiltration Over C2 Channel
Exfiltration
T1190 Exploit Public-Facing Application
Initial Access
T1068 Exploitation for Privilege Escalation
Privilege Escalation
T1078 Valid Accounts
Persistence
T1565.002 Stored Data Manipulation
Impact