VulnerabilityModified
CVE-2021-22886
Rocket.Chat before 3.11, 3.10.5, 3.9.7, 3.8.8 is vulnerable to persistent cross-site scripting (XSS) using nested markdown tags allowing a remote attacker to inject arbitrary JavaScript in a message.
MEDIUM 6.1EPSS 1.70%
Does this matter?
Lower severity and a low EPSS score (1.70%). Track it; it rarely justifies an emergency change on its own.
Description
Rocket.Chat before 3.11, 3.10.5, 3.9.7, 3.8.8 is vulnerable to persistent cross-site scripting (XSS) using nested markdown tags allowing a remote attacker to inject arbitrary JavaScript in a message. This flaw leads to arbitrary file read and RCE on Rocket.Chat desktop app.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 1.70% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- rocket.chat/rocket.chat
- Source
- support@hackerone.com
References
- https://docs.rocket.chat/guides/security/security-updatesVendor Advisory
- https://github.com/RocketChat/Rocket.Chat/pull/20430Patch, Third Party Advisory
- https://hackerone.com/reports/1014459Third Party Advisory
- https://docs.rocket.chat/guides/security/security-updatesVendor Advisory
- https://github.com/RocketChat/Rocket.Chat/pull/20430Patch, Third Party Advisory
- https://hackerone.com/reports/1014459Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.