What’s Vulnerable › Vulnerabilities

CVE-2020-15926

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-08-18 · updated 2026-06-17
• Weakness: CWE-79

Description

Rocket.Chat through 3.4.2 allows XSS where an attacker can send a specially crafted message to a channel or in a direct message to the client which results in remote code execution on the client side.

Affected products

• Rocket.Chat: through 3.4.2

References

• https://blog.redteam.pl/2020/08/rocket-chat-xss-rce-cve-2020-15926.html
• https://github.com/RocketChat/Rocket.Chat/commits/develop
• https://github.com/RocketChat/Rocket.Chat/pull/18356
• https://blog.redteam.pl/2020/08/rocket-chat-xss-rce-cve-2020-15926.html
• https://github.com/RocketChat/Rocket.Chat/commits/develop
• https://github.com/RocketChat/Rocket.Chat/pull/18356

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