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Vulnerability record · CVE-2018-6608 · published 28 March 2018

CVE-2018-6608: Opera browser information exposure vulnerability

Opera · Opera Browser

In the WebRTC component in Opera 51.0.2830.55, after visiting a web site that attempts to gather complete client information (such as https://ip.voidsec.com), the browser can disclose a private IP address in a STUN request.

4.3 CVSS 3.0 Medium EPSS 3.2% · top 12.2% CWE-200 · Information exposure
4.3CVSS 3.0 base score, v2 4.3
3.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

In the WebRTC component in Opera 51.0.2830.55, after visiting a web site that attempts to gather complete client information (such as https://ip.voidsec.com), the browser can disclose a private IP address in a STUN request.

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://docs.google.com/spreadsheets/d/1Nm7mxfFvmdn-3Az-BtE5O0BIdbJiIAWUnkoAF_v_0ug/edit?usp=sharing Third Party Advisory
https://github.com/VoidSec/WebRTC-Leak Third Party Advisory
https://news.ycombinator.com/item?id=16699270 Issue Tracking
https://voidsec.com/vpn-leak/ Third Party Advisory
https://www.bleepingcomputer.com/news/security/many-vpn-providers-leak-customers-ip-address-via-webrtc-bug/ Third Party Advisory
https://docs.google.com/spreadsheets/d/1Nm7mxfFvmdn-3Az-BtE5O0BIdbJiIAWUnkoAF_v_0ug/edit?usp=sharing Third Party Advisory
https://github.com/VoidSec/WebRTC-Leak Third Party Advisory
https://news.ycombinator.com/item?id=16699270 Issue Tracking
https://voidsec.com/vpn-leak/ Third Party Advisory
https://www.bleepingcomputer.com/news/security/many-vpn-providers-leak-customers-ip-address-via-webrtc-bug/ Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2013-3211Opera browser vulnerabilityUnspecified vulnerability in Opera before 12.15 has unknown impact and attack vectors, related to a "moderately severe issue."EPSS 1.7%10.0CVE-2012-4145Opera browser vulnerabilityUnspecified vulnerability in Opera before 12.01 on Windows and UNIX, and before 11.66 and 12.x before 12.01 on Mac OS X, has unknown impact and attac…EPSS 2.2%10.0CVE-2012-3559Opera browser vulnerabilityUnspecified vulnerability in Opera before 12.00 on Mac OS X has unknown impact and attack vectors, related to a "moderate severity issue."EPSS 1.4%10.0CVE-2012-3561Opera browser memory buffer overflow vulnerabilityOpera before 11.64 does not properly allocate memory for URL strings, which allows remote attackers to execute arbitrary code or cause a denial of se…EPSS 5.2%10.0CVE-2011-4683Opera browser vulnerabilityUnspecified vulnerability in Opera before 11.60 has unknown impact and attack vectors, related to a "moderately severe issue."EPSS 2.0%10.0CVE-2011-4684Opera browser vulnerabilityOpera before 11.60 does not properly handle certificate revocation, which has unspecified impact and remote attack vectors related to "corner cases."EPSS 5.7%10.0CVE-2011-2610Opera browser vulnerabilityUnspecified vulnerability in Opera before 11.50 has unknown impact and attack vectors, related to a "moderately severe issue."EPSS 2.1%10.0CVE-2011-2628Opera browser improper input validation vulnerabilityOpera before 11.11 does not properly implement FRAMESET elements, which allows remote attackers to execute arbitrary code or cause a denial of servic…EPSS 13%

Source: NIST National Vulnerability Database (record CVE-2018-6608), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.