Vulnerability · Published Nov 19, 2025 · Assigned by GitHub_M

CVE-2025-65028Rallly Has an IDOR Vulnerability in Vote Update Endpoint Allows Unauthorized Manipulation of Participant Votes

Medium 6.5

In plain English

A medium-severity authorization bypass via user-controlled key in rallly from lukevella. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 80.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Rallly is an open-source scheduling and collaboration tool. Prior to version 4.5.4, an insecure direct object reference (IDOR) vulnerability allows any authenticated user to modify other participants’ votes in polls without authorization. The backend relies solely on the participantId parameter to identify which votes to update, without verifying ownership or poll permissions. This allows an attacker to alter poll results in their favor, directly compromising data integrity. This issue has been patched in version 4.5.4.

Affected products (as reported)

Vendor	Product	Versions
lukevella	rallly	< 4.5.4

Weakness: CWE-285, CWE-639, CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

References

https://github.com/lukevella/rallly/security/advisories/GHSA-pchc-v5hg-f5gp x_refsource_CONFIRM
https://github.com/lukevella/rallly/releases/tag/v4.5.4 x_refsource_MISC