Information disclosure in Lukevella Rallly
CVE-2025-66027
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.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (26.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Lukevella Rallly — versions < 4.5.6
- Rallly
Weakness classification (CWE)
References
- github.com/lukevella/rallly/security/advisories/GHSA-65wg-8xgw-f3fg (Exploit, Vendor Advisory)
- github.com/lukevella/rallly/commit/59738c04f9a8ec25f0af5ce20ad0eab6cf134963 (Patch)
- github.com/lukevella/rallly/releases/tag/v4.5.6 (Release Notes)
Frequently asked questions
- What is CVE-2025-66027?
- CVE-2025-66027 is a medium-severity vulnerability in Lukevella Rallly, classified under Information Disclosure. CVSS score: 6.5/10. Published 2025-11-29.
- How severe is CVE-2025-66027?
- Medium severity. CVSS v3 base score is 6.5 out of 10.