What’s Vulnerable › Vulnerabilities

CVE-2020-8291

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-18 · updated 2026-06-17
• Weakness: CWE-79

Description

A link preview rendering issue in Rocket.Chat versions before 3.9 could lead to potential XSS attacks.

Affected products

• Rocket.Chat: before 3.9.0 — fixed in 3.9.0

How to fix

Upgrade to a fixed version: Rocket.Chat 3.9.0. Check the vendor advisory for mitigations.

References

• https://github.com/RocketChat/Rocket.Chat/pull/19854
• https://github.com/RocketChat/Rocket.Chat/pull/19854

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