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CVE-2025-5323: Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking in fossasia open-event-server

Medium
VulnerabilityCVE-2025-5323cvecve-2025-5323
Published: Thu May 29 2025 (05/29/2025, 18:00:06 UTC)
Source: CVE Database V5
Vendor/Project: fossasia
Product: open-event-server

Description

A vulnerability, which was classified as problematic, has been found in fossasia open-event-server 1.19.1. This issue affects the function send_email_change_user_email of the file /fossasia/open-event-server/blob/development/app/api/helpers/mail.py of the component Mail Verification Handler. The manipulation leads to reliance on obfuscation or encryption of security-relevant inputs without integrity checking. The attack may be initiated remotely. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

AI-Powered Analysis

AILast updated: 07/07/2025, 22:39:45 UTC

Technical Analysis

CVE-2025-5323 is a medium-severity vulnerability identified in version 1.19.1 of the fossasia open-event-server, specifically within the Mail Verification Handler component. The flaw resides in the function send_email_change_user_email located in the mail.py file. The vulnerability stems from the system's reliance on obfuscation or encryption of security-relevant inputs without implementing integrity checks. This means that while the inputs may be encrypted or obfuscated, there is no mechanism to verify that these inputs have not been tampered with during transmission or processing. An attacker could potentially manipulate these inputs remotely, although the attack complexity is considered high and exploitation is difficult. No authentication or user interaction is required for exploitation, and the attack vector is network-based. The CVSS 4.0 score of 6.3 reflects a medium severity, indicating a moderate impact primarily on the integrity of the system, with no direct impact on confidentiality or availability. The vulnerability has been publicly disclosed, but no patch or vendor response has been provided yet. This lack of vendor engagement increases the risk for organizations relying on this software, as mitigations must be implemented independently until an official fix is available.

Potential Impact

For European organizations using fossasia open-event-server 1.19.1, this vulnerability could undermine the integrity of email change verification processes. This could allow attackers to manipulate email change requests, potentially leading to unauthorized account modifications or hijacking. Such unauthorized changes could disrupt user account management, erode trust in event management platforms, and expose organizations to further attacks or data inconsistencies. While the vulnerability does not directly compromise confidentiality or availability, the integrity breach could have cascading effects, such as enabling phishing or social engineering attacks by altering contact information. Given the open-source nature of the software and its use in event management, organizations involved in conferences, community events, or academic gatherings across Europe could face operational disruptions and reputational damage if exploited.

Mitigation Recommendations

Since no official patch or vendor response is available, European organizations should implement several targeted mitigations: 1) Introduce additional integrity verification mechanisms for security-relevant inputs, such as cryptographic message authentication codes (MACs) or digital signatures, to ensure that obfuscated or encrypted data has not been altered. 2) Restrict network access to the open-event-server instance by implementing strict firewall rules and network segmentation to limit exposure to untrusted networks. 3) Monitor and log all email change requests and related API calls for anomalies or unusual patterns that could indicate exploitation attempts. 4) Employ multi-factor authentication (MFA) for user account changes to add an additional layer of verification beyond email confirmation. 5) Consider upgrading to a later version of the software if available or applying custom patches to address the integrity checking deficiency. 6) Engage with the fossasia community or maintainers to encourage timely patch development and share threat intelligence related to this vulnerability.

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Technical Details

Data Version
5.1
Assigner Short Name
VulDB
Date Reserved
2025-05-29T08:20:46.882Z
Cvss Version
4.0
State
PUBLISHED

Threat ID: 6838a40f182aa0cae2888dcf

Added to database: 5/29/2025, 6:14:39 PM

Last enriched: 7/7/2025, 10:39:45 PM

Last updated: 7/30/2025, 4:10:56 PM

Views: 17

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