CVE-2021-22911
CriticalExploitedPublic exploitA improper input sanitization vulnerability exists in Rocket.Chat server 3.11, 3.12 & 3.13 that could lead to unauthenticated NoSQL injection, resulting potentially in RCE.
Published May 27, 2021 · Updated Aug 7, 2026
Key Facts
Patch immediately- CVE-2021-22911 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Rocket.chat, Rocket.Chat server.
- It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Oct 14, 2023. Public exploit code is available.
- EPSS estimates a 95% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
95%
Higher than 99.8% of all scored CVEs
Exploited in the wild
Yes
2 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2021-22911 brief as a PDF
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Description
A improper input sanitization vulnerability exists in Rocket.Chat server 3.11, 3.12 & 3.13 that could lead to unauthenticated NoSQL injection, resulting potentially in RCE.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Nov 14, 2023 | n/a | Not reported |
| CIRCL KEV | Oct 14, 2023 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Rocket.chatRocket.chat | 3.11.0, 3.12.0, 3.13.0 | n/a |
| Rocket.Chat server | >= Fixed in: 3.13.2, 3.12.4, 3.11.4 | n/a |
Timeline
Publicly disclosed
May 27, 2021
Added to CIRCL KEV
Oct 14, 2023
Added to Industry KEV feed
Nov 14, 2023
Last updated
Aug 7, 2026
Weakness Type
- CWE-75 Failure to Sanitize Special Elements into a Different Plane (Special Element Injection)
References
- exploithttp://packetstormsecurity.com/files/162997/Rocket.Chat-3.12.1-NoSQL-Injection-Code-Execution.html
- exploithttp://packetstormsecurity.com/files/163419/Rocket.Chat-3.12.1-NoSQL-Injection-Code-Execution.html
- exploithttps://blog.sonarsource.com/nosql-injections-in-rocket-chat
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
A improper input sanitization vulnerability exists in Rocket.Chat server 3.11, 3.12 & 3.13 that could lead to unauthenticated NoSQL injection, resulting potentially in RCE.
Affected: Rocket.chat versions 3.11.0, 3.12.0, 3.13.0; Rocket.Chat server versions >= Fixed in: 3.13.2, 3.12.4, 3.11.4. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Oct 14, 2023.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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