CVE-2025-11952 is a stored Cross-site Scripting (XSS) vulnerability classified under CWE-79 affecting Oct8ne Chatbot version 2.3. The flaw arises from improper neutralization of user input during web page generation, specifically in the functionality that creates chat transcripts and sends them via email through the /Records/SendSummaryMail endpoint. An attacker can craft malicious JavaScript payloads embedded within chat transcripts that, when viewed by a recipient, execute in the victim’s browser context. This execution can lead to theft of sensitive information such as session cookies or enable the attacker to perform actions on behalf of the user without their consent. The vulnerability is remotely exploitable over the network without requiring authentication (AV:N, PR:N) but requires user interaction (UI:P) to trigger the payload, such as opening the emailed transcript. The CVSS 4.0 vector indicates low attack complexity and no privileges or user credentials are needed. The scope is limited to the affected chatbot version 2.3, and no known exploits have been observed in the wild. The vulnerability’s medium severity score (5.3) reflects its potential impact on confidentiality and integrity, with limited availability impact. No patches or official fixes have been published yet, making mitigation reliant on configuration changes or user awareness.

For European organizations, this vulnerability poses a moderate risk primarily to confidentiality and integrity of user data. Organizations using Oct8ne Chatbot 2.3 for customer support or engagement may face session hijacking, credential theft, or unauthorized actions performed via compromised user sessions. This could lead to data breaches, reputational damage, and regulatory non-compliance under GDPR due to exposure of personal data. The email-based delivery mechanism increases risk as phishing or social engineering could be leveraged to entice users to open malicious transcripts. The impact is particularly significant for sectors with high customer interaction volumes such as e-commerce, banking, telecommunications, and public services. While availability is not directly affected, the indirect consequences of compromised user accounts or data leakage can disrupt operations and customer trust.

1. Immediately restrict or disable the /Records/SendSummaryMail functionality until a patch is available. 2. Implement strict input validation and output encoding on all user-supplied content used in transcript generation to neutralize scripts. 3. Employ Content Security Policy (CSP) headers to limit execution of unauthorized scripts in browsers. 4. Educate users to be cautious when opening emailed chat transcripts, especially from unknown or unexpected sources. 5. Monitor logs for unusual activity related to transcript generation and email sending. 6. If possible, upgrade to a patched version once released by Oct8ne or apply vendor-provided workarounds. 7. Use email filtering solutions to detect and quarantine suspicious emails containing malicious payloads. 8. Conduct regular security assessments of chatbot integrations and related email functionalities. 9. Consider multi-factor authentication to reduce impact of session hijacking. 10. Coordinate with incident response teams to prepare for potential exploitation attempts.