CVE-2025-24458: JetBrains YouTrack Auth Bypass Vulnerability

CVE-2025-24458 Overview

CVE-2025-24458 is an authentication weakness in JetBrains YouTrack versions before 2024.3.55417. The vulnerability allows account takeover through spoofed email addresses combined with the Helpdesk integration feature. The flaw is classified under CWE-290 (Authentication Bypass by Spoofing), which permits attackers to impersonate legitimate users by forging email identifiers trusted by the Helpdesk workflow.

JetBrains addressed the issue in build 2024.3.55417 of YouTrack. Organizations running affected versions face risks to confidentiality, integrity, and availability of project data hosted in YouTrack instances.

Critical Impact
Successful exploitation grants attackers full control over targeted YouTrack accounts, exposing issue trackers, customer support tickets, and integrated repositories.

Affected Products

JetBrains YouTrack versions prior to 2024.3.55417
YouTrack instances with Helpdesk integration enabled
Self-hosted and on-premises YouTrack deployments

Discovery Timeline

2025-01-21 - CVE-2025-24458 published to NVD
2025-01-30 - Last updated in NVD database

Technical Details for CVE-2025-24458

Vulnerability Analysis

The vulnerability resides in how YouTrack's Helpdesk integration validates the origin of inbound email messages. The Helpdesk feature accepts email as a trusted channel for ticket creation and user identification. When email spoofing protections are insufficient, an attacker can craft messages that appear to originate from a legitimate user's address.

The Helpdesk integration links incoming email identities to existing YouTrack accounts. By forging the sender address of a target account, an attacker can trigger workflows that associate attacker-controlled content with the victim's identity. This authentication-by-spoofing weakness (CWE-290) bypasses the trust model that normally separates email correspondents from authenticated platform users.

The attack requires user interaction and local access conditions per the CVSS vector, but yields high impact across confidentiality, integrity, and availability dimensions once exploitation succeeds.

Root Cause

The root cause is insufficient verification of email sender authenticity within the Helpdesk integration. YouTrack treated sender-supplied identity claims as authoritative without enforcing cryptographic or session-bound verification. This allowed forged From headers to be mapped to existing user accounts.

Attack Vector

An attacker sends a spoofed email to the Helpdesk endpoint of a target YouTrack instance, impersonating a valid user. The Helpdesk integration processes the message and associates the spoofed identity with the targeted account context. The attacker leverages this trust to perform actions that lead to account takeover. The vulnerability mechanism is documented in the JetBrains Fixed Security Issues advisory.

Detection Methods for CVE-2025-24458

Indicators of Compromise

Inbound Helpdesk emails with From headers matching internal user addresses but originating from external mail servers
SPF, DKIM, or DMARC validation failures on Helpdesk-bound mail
YouTrack audit log entries showing account activity originating from unexpected Helpdesk-triggered workflows
Unexplained permission changes or issue assignments tied to Helpdesk-created tickets

Detection Strategies

Correlate YouTrack audit logs against mail gateway logs to identify Helpdesk submissions that failed email authentication checks
Alert on Helpdesk tickets created from external senders that match privileged internal user identifiers
Monitor for first-time access patterns following Helpdesk-originated account activity

Monitoring Recommendations

Enable verbose logging on the YouTrack Helpdesk integration and forward logs to a central SIEM
Track DMARC, SPF, and DKIM verification results for the inbound mail domain feeding Helpdesk
Review account session telemetry for anomalies following Helpdesk message ingestion

How to Mitigate CVE-2025-24458

Immediate Actions Required

Upgrade YouTrack to version 2024.3.55417 or later without delay
Audit Helpdesk integration logs for spoofed email submissions since deployment
Force password resets and re-authentication for accounts associated with suspicious Helpdesk activity
Enforce SPF, DKIM, and DMARC validation on the mail domain feeding the Helpdesk integration

Patch Information

JetBrains released the fix in YouTrack build 2024.3.55417. Refer to the JetBrains Fixed Security Issues advisory for the official remediation guidance and the complete list of patched issues.

Workarounds

Disable the Helpdesk integration until the patched version is deployed if upgrade is not immediately feasible
Restrict inbound Helpdesk email to a curated allowlist of authenticated mail relays
Require DMARC reject policy enforcement on the mail gateway routing messages to YouTrack

bash

# Verify YouTrack version after upgrade
curl -s https://your-youtrack-instance/api/config | grep version

# Example DMARC policy for the Helpdesk mail domain
# Published as a TXT record at _dmarc.example.com
v=DMARC1; p=reject; rua=mailto:dmarc-reports@example.com; adkim=s; aspf=s