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CVE-2020-15258

8.0 · HIGH

In Wire before 3.20.x, `shell.openExternal` was used without checking the URL.

Published Oct 16, 2020CWE-20EPSS 2.08%

Overview

CVE-2020-15258 is a high-severity vulnerability. It was published on October 16, 2020 and has a CVSS 3.1 base score of 8.0 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

In Wire before 3.20.x, `shell.openExternal` was used without checking the URL. This vulnerability allows an attacker to execute code on the victims machine by sending messages containing links with arbitrary protocols. The victim has to interact with the link and sees the URL that is opened. The issue was patched by implementing a helper function which checks if the URL's protocol is common. If it is common, the URL will be opened externally. If not, the URL will not be opened and a warning appears for the user informing them that a probably insecure URL was blocked from being executed. The issue is patched in Wire 3.20.x. More technical details about exploitation are available in the linked advisory.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refbenjamin-altpeter.de/shell-openexternal-dangers/GitHubgithub.com/wireapp/wire-desktop/commit/b3705fffa75a03f055530f55a754face5ac0623bGitHubgithub.com/wireapp/wire-desktop/security/advisories/GHSA-5gpx-9976-ggpmRefbenjamin-altpeter.de/shell-openexternal-dangers/GitHubgithub.com/wireapp/wire-desktop/commit/b3705fffa75a03f055530f55a754face5ac0623bGitHubgithub.com/wireapp/wire-desktop/security/advisories/GHSA-5gpx-9976-ggpm

How CyberStrike helps

Frequently asked questions

What is CVE-2020-15258?

CVE-2020-15258 is a high-severity vulnerability. It was published on October 16, 2020 and has a CVSS 3.1 base score of 8.0 (HIGH).

How severe is CVE-2020-15258?

This vulnerability has a CVSS 3.1 base score of 8.0, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-15258?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-15258?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-15258 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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