CVE-2020-6159

Name: CVE-2020-6159
Creator: NVD / NIST
Published: 2020-12-23T16:15:13.093+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.63%

Last modified Jun 17, 2026

CVE-2020-6159 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. URLs using “javascript:” have the protocol removed when pasted into the address bar to protect users from cross-site scripting (XSS) attacks, but in certain circumstances this removal was not performed. This could allow users to be socially engineered to run an XSS attack against themselves. EPSS estimates a 0.63% chance of exploitation in the next 30 days.

Description

URLs using “javascript:” have the protocol removed when pasted into the address bar to protect users from cross-site scripting (XSS) attacks, but in certain circumstances this removal was not performed. This could allow users to be socially engineered to run an XSS attack against themselves. This vulnerability affects Opera for Android versions below 61.0.3076.56532.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.63%

45.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Opera	Opera	< 61.0.3076.56532

References

https://security.opera.com/cross-site-scripting-in-ofa-opera-security-advisories/Vendor Advisory
https://security.opera.com/cross-site-scripting-in-ofa-opera-security-advisories/Vendor Advisory

Timeline

Published: Dec 23, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-6159?

How severe is CVE-2020-6159?

CVE-2020-6159 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.63% probability of exploitation in the next 30 days.

How do I fix CVE-2020-6159?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-6159?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST