CVE-2025-66027 Rallly Information Disclosure Vulnerability in Participant API Leaks Names and Emails Despite Pro Privacy Settings
Attackers can view participant names and emails via API endpoints, bypassing privacy settings in Rallly scheduling tool.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-66027?
CVE-2025-66027 is a high-severity vulnerability in lukevella rallly, published on 29 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2025-66027?
It affects 1 product.
Products include Rallly Rallly.
How do I fix CVE-2025-66027?
No fix has been published for CVE-2025-66027 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-66027 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-66027 exists.
Other vulnerabilities in lukevella rallly
- CVE-2025-47781 Rallly Insufficient Password Login Token Entropy Leads to Account Takeover
- CVE-2025-65021 Rallly Has Unauthorized Poll Finalization via Insecure Direct Object Reference (IDOR)
- CVE-2025-65029 Rallly Has an IDOR Vulnerability in Participant Deletion Endpoint Allows Unauthorized Removal of Poll Participants
- CVE-2025-65033 Rallly Broken Authorization: Any User Can Pause or Resume Any Poll via Poll ID Manipulation
- CVE-2025-65034 Rallly Improper Authorization Allows Reopening of Any Finalized Poll via Public pollId
Sources
Also known as GHSA-65wg-8xgw-f3fg.