CVE-2025-8205 is a vulnerability identified in the Comodo Dragon web browser, specifically affecting versions up to 134.0.6998.179. The flaw resides within the IP DNS Leakage Detector component, which is responsible for monitoring and preventing DNS leaks that could expose user browsing activity. The vulnerability causes sensitive information to be transmitted in cleartext over the network, which could be intercepted by attackers. This cleartext transmission undermines confidentiality, potentially exposing user data such as DNS queries or other sensitive network information. The attack vector is remote, meaning an attacker does not require physical access to the victim's system. However, the attack complexity is rated as high, indicating that exploitation requires significant effort or specialized conditions. No user interaction or authentication is necessary to exploit this vulnerability, but the difficulty in exploitation reduces the likelihood of widespread attacks. The vendor, Comodo, was notified early but has not issued any response or patch, leaving users exposed. The CVSS v4.0 base score is 6.3, categorized as medium severity, reflecting the moderate impact and exploitation difficulty. No known exploits are currently observed in the wild, but public disclosure of the exploit code increases the risk of future attacks. The vulnerability does not affect integrity or availability directly but compromises confidentiality by leaking sensitive information. The lack of a patch and vendor response heightens the risk for users relying on Comodo Dragon for secure browsing, especially in environments where DNS privacy is critical.

For European organizations, the cleartext transmission of sensitive information via the IP DNS Leakage Detector in Comodo Dragon could lead to exposure of internal DNS queries and browsing patterns. This leakage can facilitate reconnaissance by threat actors, enabling them to map internal network structures or identify sensitive targets. Organizations handling personal data under GDPR may face compliance risks if such leaks expose personal or confidential information. Additionally, sectors with high privacy requirements, such as finance, healthcare, and government, could suffer reputational damage or targeted attacks due to this vulnerability. Although exploitation complexity is high, the public availability of exploit details increases the risk over time. European companies using Comodo Dragon as a browser, especially in sensitive or regulated environments, should consider the potential for data leakage and subsequent targeted attacks or espionage. The vulnerability could also undermine trust in secure communications and complicate incident response efforts if attackers leverage leaked DNS data to bypass security controls.

Given the absence of an official patch from Comodo, European organizations should take immediate steps to mitigate risk. First, discontinue or limit the use of Comodo Dragon browser in sensitive environments until a fix is available. Replace it with browsers that have robust DNS leak protection and are actively maintained. Implement network-level DNS encryption solutions such as DNS over HTTPS (DoH) or DNS over TLS (DoT) to reduce the risk of DNS data interception, regardless of client-side vulnerabilities. Employ network monitoring to detect unusual DNS traffic patterns that may indicate exploitation attempts. Educate users about the risks of using outdated or unsupported browser versions. Where possible, isolate systems running Comodo Dragon from critical networks or sensitive data repositories. Finally, maintain vigilance for vendor updates or community patches and apply them promptly once available.