Mail Verification Handler Vulnerability in fossasia open-event-server
CVE-2025-5323

6.3MEDIUM

Key Information:

Vendor

Fossasia

Status
Open-event-server
Vendor
CVE Published:
29 May 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-5323?

A vulnerability has been discovered in fossasia open-event-server version 1.19.1 affecting its Mail Verification Handler, specifically in the send_email_change_user_email function located at /fossasia/open-event-server/blob/development/app/api/helpers/mail.py. The vulnerability arises from the reliance on the obfuscation or encryption methods for critical security inputs without adequate integrity assurance. This flaw allows remote attacks, and while exploiting it is challenging, the details have been made public, potentially facilitating malicious exploits. The vendor has been notified of this issue, yet no response has been received.

Affected Version(s)

open-event-server 1.19.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-5323 - Proof of Concept

References

https://vuldb.com/?id.310493
vdb-entrytechnical-description
https://vuldb.com/?ctiid.310493
signaturepermissions-required
https://vuldb.com/?submit.580256
third-party-advisory

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Gavin Zhong (VulDB User)
.
CVE-2025-5323 : Mail Verification Handler Vulnerability in fossasia open-event-server