CVE-2025-66027

Name: CVE-2025-66027
Creator: NVD / NIST
Published: 2025-11-29T01:16:02.807+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 0.30%

Last modified Jun 17, 2026

CVE-2025-66027 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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. EPSS estimates a 0.30% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS 4.0

7.1/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.30%

21.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Rallly	Rallly	< 4.5.6

References

https://github.com/lukevella/rallly/commit/59738c04f9a8ec25f0af5ce20ad0eab6cf134963Patch
https://github.com/lukevella/rallly/releases/tag/v4.5.6Release Notes
https://github.com/lukevella/rallly/security/advisories/GHSA-65wg-8xgw-f3fgExploit, Vendor Advisory
https://github.com/lukevella/rallly/security/advisories/GHSA-65wg-8xgw-f3fgExploit, Vendor Advisory

Timeline

Published: Nov 29, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-66027?

How severe is CVE-2025-66027?

CVE-2025-66027 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.

How do I fix CVE-2025-66027?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-66027?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST