CVE-2025-8206: Comodo Dragon Browser Vulnerable to Cross-Site Scripting
This blog post details a recently disclosed vulnerability, CVE-2025-8206, affecting the Comodo Dragon browser. The vulnerability is a cross-site scripting (XSS) flaw that could potentially allow attackers to inject malicious scripts into the browser.
Vulnerability Details
- CVE ID: CVE-2025-8206
- Description: A cross-site scripting (XSS) vulnerability exists in Comodo Dragon up to version 134.0.6998.179, specifically within the IP DNS Leakage Detector component. This allows for remote exploitation by injecting malicious scripts.
- CVSS Score and Vector:
- CVSS 3.1: 3.1 (LOW) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
- CVSS 4.0: 2.3 (LOW) - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Explanation: A low CVSS score indicates a less severe vulnerability. The high attack complexity and the requirement for user interaction reduce the risk. The CVSS vector indicates the attack is launched over the network, requires a high degree of skill to exploit, and needs a user to passively interact with a malicious link. Successful exploitation can lead to limited integrity impact.
- Exploit Requirements: Successful exploitation requires tricking a user into interacting with a crafted link or webpage. The attacker needs some sophistication to craft the attack effectively.
- Affected Vendor, Product, Version: Comodo Dragon up to 134.0.6998.179
- CWE: CWE-79 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) and CWE-94 (Improper Control of Generation of Code ('Code Injection'))
Explanation: CWE-79 means the application fails to properly sanitize user-supplied input before displaying it on a web page. CWE-94 means the application allows external control over code generation, leading to arbitrary code execution.
Timeline of Events
- Reported: Unknown
- Disclosed: 2025-07-26 (approximate)
- Vendor Contacted: Early disclosure, no response.
Exploitability & Real-World Risk
The exploitability is considered difficult due to the high attack complexity and the need for user interaction. However, given a proof-of-concept exploit is publicly available, the risk increases. An attacker could potentially use this vulnerability to inject malicious scripts into websites visited by Comodo Dragon users, leading to account compromise, data theft, or malware installation. The real-world risk is moderate if users are cautious about clicking suspicious links. Broader context: Comodo Dragon is a Chromium-based browser, so the impact will depends on users of the browser.
Recommendations
- Update: Upgrade to the latest version of Comodo Dragon once a patch is available. Since the vendor did not respond, users may consider switching to a more actively maintained browser.
- Be Cautious: Exercise caution when clicking on links from untrusted sources or visiting unfamiliar websites.
- Security Software: Ensure your antivirus and anti-malware software are up-to-date.
Technical Insight
The vulnerability likely lies in how the IP DNS Leakage Detector handles user input or server responses. If the browser fails to properly sanitize or validate the data processed by this component, an attacker can inject arbitrary JavaScript code, which will then be executed within the context of the user's browser session.
Credit to Researcher(s)
Vulnerability reported by FMisec.
References
Tags
#ComodoDragon #XSS #CVE-2025-8206 #BrowserSecurity #Vulnerability
Summary: CVE-2025-8206 is a cross-site scripting (XSS) vulnerability in Comodo Dragon browser up to version 134.0.6998.179. It affects the IP DNS Leakage Detector, allowing remote attackers to inject malicious scripts. Exploitability is difficult, but a PoC exists. Users should update their browser and be cautious about suspicious links.
CVE ID: CVE-2025-8206
Risk Analysis: Successful exploitation could allow an attacker to inject malicious scripts into websites visited by Comodo Dragon users. This could lead to account compromise, data theft, or malware installation.
Recommendation: Upgrade to the latest version of Comodo Dragon as soon as a patch is available. Exercise caution when clicking on links from untrusted sources or visiting unfamiliar websites.
Timeline
- Unknown: Vulnerability Reported
- 2025-07-26: Vulnerability Publicly Disclosed