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TI-2025-40553 Aliases CVE-2025-66027

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

Priority MEDIUM 64CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure, Security bypass
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-200 and CWE-284.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00377 31st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed rallly (lukevella): 4.5.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
lukevellaralllybefore 4.5.64.5.6Patch availableCNA
  • rallly Vendorlukevella Affected before 4.5.6 Fixed in 4.5.6 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:rallly:rallly:*:*:*:*:*:*:*:*before 4.5.6Vulnerablelukevella
  • cpe:2.3:a:rallly:rallly:*:*:*:*:*:*:*:* Versions before 4.5.6 Vulnerable ·lukevella

Remediation

  • Fix · CNA rallly (lukevella) Fixed in 4.5.6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-66027

References

Exploit 1

Patch 1

Other 1

  • TI-2025-30246 Rallly Insufficient Password Login Token Entropy Leads to Account Takeover CVSS 3.1CRITICAL 9.8
  • TI-2025-40207 Rallly Has Unauthorized Poll Finalization via Insecure Direct Object Reference (IDOR) CVSS 3.1CRITICAL 9.1
  • TI-2025-40220 Rallly Improper Authorization Allows Reopening of Any Finalized Poll via Public pollId CVSS 3.1HIGH 8.1
  • TI-2025-40219 Rallly Broken Authorization: Any User Can Pause or Resume Any Poll via Poll ID Manipulation CVSS 3.1HIGH 8.1
  • TI-2025-40215 Rallly Has an IDOR Vulnerability in Participant Deletion Endpoint Allows Unauthorized Removal of Poll Participants CVSS 3.1HIGH 8.1
  • TI-2025-40216 Rallly Improper Authorization in Comment Deletion Endpoint Allows Unauthorized Comment Removal CVSS 3.1HIGH 7.1
See all 10 →

Sources

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