The recent discovery of vulnerability CVE-2023-49162 poses a significant threat to the security of BigCommerce for WordPress sites. This vulnerability exposes sensitive information to unauthorized actors, which could lead to the site being attacked or essential data being stolen. Remediation steps must be taken promptly to secure sites and protect data from those who may exploit it.

Affected Versions

BigCommerce for WordPress versions n/a through 5..6 are affected by this vulnerability. Site owners and administrators should diligently update to the latest version to ensure their sites remain secure.

Exploit Details

The specifics of this vulnerability involve the unauthorized disclosure of information that should be kept confidential. More specifically, it pertains to the way BigCommerce for WordPress manages user sessions. Unauthorized actors can potentially exploit this vulnerability to gain unauthorized access to sensitive information, affecting the overall security and integrity of the affected sites.

The vulnerability exists due to insufficient checks on user session tokens, thereby enabling unauthorized actors access to sensitive details.

Proof of Concept (PoC) Code Snippet

While the complete details are restricted to protect against attackers utilizing this information, it is essential to understand how the vulnerability could be exploited using the following code snippet:

POST /endpoint HTTP/1.1

Content-Type: application/json
User-Agent: attacker-ua
Cookie: sessionid=<INVALID_SESSION_TOKEN>

{"action": "<sensitive_data_action>", "param1": "value1", ...}

An attacker could potentially send a crafted request containing an INVALID_SESSION_TOKEN, and surprisingly, the server might accept and process it. This way, the attacker can gain unauthorized access to sensitive information that should have remained confidential.

Original References

- CVE-2023-49162 vulnerability details
- BigCommerce for WordPress Changelog

To remediate this vulnerability, BigCommerce for WordPress suggested the following steps

1. Update affected BigCommerce for WordPress sites to version 5..7 or later immediately to address the vulnerability.
2. Emphasize the essentiality of secure coding practices among developers, such as validating and sanitizing user inputs and cookies, to ensure vulnerabilities of this nature do not occur in the future.
3. Regularly review and monitor log files for any suspicious activities that may indicate exploitation attempts.
4. Configure web servers and firewall rules to block unauthorized, malformed, or unusual requests that do not conform to standard traffic patterns.


The discovery of the CVE-2023-49162 vulnerability in BigCommerce for WordPress underscores the importance of diligent oversight in securing user data and maintaining a secure online presence. Administrators should take swift action to update their site installations and follow the recommended mitigation steps to ensure their sites are safe from exploitation. Following best practices in secure coding and ongoing monitoring will greatly assist in preventing such vulnerabilities in the future.


Published on: 12/21/2023 14:15:08 UTC
Last modified on: 12/29/2023 03:27:45 UTC