CVE-2013-3215: vtiger CRM validateSession authentication bypass

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 19 September 2026. Confidence: medium.

critical priorityCVSS 9.8 with network reachability, no privileges and no user interaction, combined with a very high EPSS score, makes this a top remediation priority despite the absence of KEV listing.

What it is

vtiger CRM 5.4.0 and earlier fail to properly validate authentication in the validateSession function, allowing an attacker to bypass login checks. Because the flaw is remotely reachable with no credentials or user interaction, it exposes the CRM to full compromise. The record gives no further detail on the exact validation logic or affected deployment configurations.

Impact

An unauthenticated attacker gains access to the CRM as an authenticated user, with the CVSS vector indicating high confidentiality, integrity and availability impact. That typically means access to customer records and the ability to modify or disrupt CRM data.

Attack surface

Reachable over the network via HTTP requests to the CRM application; the CVSS vector (AV:N/AC:L/PR:N/UI:N) indicates no authentication and no user interaction are required. The description does not specify which endpoint or parameter triggers the validateSession flaw.

Exploitation

Not listed in CISA KEV and no ransomware associations are recorded, but EPSS is 0.68849 (99.3rd percentile), indicating a high modeled likelihood of exploitation. All references are third-party advisory or VDB entries; none are tagged as exploit code or in-the-wild reports.

What to do

• Upgrade vtiger CRM to a version later than 5.4.0, or apply the vendor fix for the validateSession authentication flaw if one is available for your branch.
• If upgrade is not immediately possible, restrict network access to the CRM to trusted networks or VPN and place it behind an authenticating reverse proxy.
• Review and harden session handling: enforce server-side session validation, rotate session identifiers on login, and reject requests with missing or malformed session tokens.
• Audit CRM accounts and permissions for unauthorized changes or additions, and rotate credentials and API keys if compromise is suspected.
• Monitor vendor and CVE feeds for a confirmed patch, since this record does not name a fixed version.

Detection

• Search web and application logs for requests that reach authenticated CRM pages or actions without a preceding successful login event.
• Alert on anomalous session identifiers, repeated validateSession calls, or access from unexpected source IPs and user agents.
• Baseline normal CRM access patterns per account and flag new accounts, permission changes, or bulk data exports outside normal behavior.
• Correlate CRM access logs with authentication logs to find sessions that have no matching successful login.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.