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.

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

EPSS: 0.003 (26.9th percentile) — read the EPSS interpretation.

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.

Affected products

Lukevella Rallly — versions < 4.5.6
Rallly

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC, 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.