CVE-2024-45404: Pretalx Logic Flaw Enables Full Account Takeover

Researchers from Novee recently disclosed a critical logic flaw in Pretalx, a widely used open-source conference management platform. According to SecurityWeek, this vulnerability allowed an attacker to achieve a 100% acceptance rate for conference talk submissions by taking over administrative accounts. The flaw, tracked as CVE-2024-45404, represents a significant risk to the integrity of technical and academic conferences that rely on the software for their Call for Papers (CFP) processes.

Understanding the Pretalx Account Takeover Vulnerability

The vulnerability stems from a logic error in how Pretalx handled email address updates. In versions prior to 2024.1.0, the application failed to properly validate or restrict users from changing their registered email address to one that was already associated with another active account. By exploiting this Pretalx account takeover vulnerability, an attacker could trigger a conflict that resulted in Privilege Escalation or total account hijacking.

In a typical exploitation scenario, an attacker would register a standard user account on a conference’s Pretalx instance. They would then initiate an email change request, setting their new email address to match the email of a known conference organizer or reviewer. Because the system did not correctly handle the verification of existing users during the update process, the attacker could effectively assume the identity of the target user. This granted them access to all permissions associated with that account, including the ability to review submissions, accept or reject talks, and view private reviewer notes.

How to Detect CVE-2024-45404 Exploitation

For SOC teams and conference administrators, identifying past exploitation requires a thorough audit of application logs. Security professionals should search for instances where a user updated their email address to an address already present in the user database. Specifically, look for discrepancies where the original account owner did not initiate the change or where multiple accounts suddenly shared the same primary email identifier.

Monitoring for MITRE ATT&CK technique T1078 (Valid Accounts) is essential here. Since the attacker is technically using a valid account after the takeover, detection must focus on the initial account modification event. Check for any unusual CVE exploitation attempts targeting the user profile update endpoint during the submission window.

The Impact of Unauthorized Conference Control

The primary risk of this flaw is the compromise of the CFP process. By hijacking an organizer’s account, an attacker can guarantee the acceptance of their own submissions. However, the implications extend beyond mere ego-boosting. Attackers could use this access to:

• Exfiltrate intellectual property from unpublished research papers and drafts.
• Access PII (Personally Identifiable Information) of hundreds of speakers and attendees.
• Manipulate the conference schedule to include malicious content or remove legitimate speakers.

Unlike an RCE which might target the underlying server infrastructure, this logic flaw directly undermines the trust model of the conference itself.

Pretalx 2024.1.0 Patch Guidance

The most effective mitigation is an immediate upgrade to the latest stable version of the software. Pretalx 2024.1.0 introduces stricter validation checks for email updates, ensuring that email address changes cannot collide with existing user records. If an immediate update is not possible, administrators should manually review all accounts with administrative or reviewer roles and audit recent email change requests for suspicious activity.

Conference organizers should prioritize this update before opening any new CFPs to maintain the confidentiality and integrity of their submission data and prevent unauthorized manipulation of the event program.