# CVE-2021-22911: Rocket.Chat server

- Exploited (CISA KEV): no
- Published: 2021-05-27
- CVSS: not scored
- EPSS: 95.2% (100th percentile)
- CWE: CWE-75

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.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | Before feed history | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | Before feed history | — | — |
| Fastly | Before feed history | — | — |
| F5 | Rule published | 2024-03-12 | 1020 |
| Akamai | No public source | — | — |
| OWASP CRS | Before feed history | — | — |

### F5

- 2024-03-12 · new · rule 200102093
  > Added: signature 200102093 "Rocket.Chat Blind NoSQL Injection" (SQL-Injection, risk High), systems: Other Web Server, MongoDB. References: CVE-2021-22911.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog
- 2024-05-21 · new · rule 200102093
  > Added: signature 200102093 "Rocket.Chat Blind NoSQL Injection" (SQL-Injection, risk High), systems: Other Web Server, MongoDB. References: CVE-2021-22911.
  Source: https://docs.cloud.f5.com/docs-v2/platform/changelogs/security-details-changelog

## Our test (measured)

- OWASP Core Rule Set 4.25.0, paranoia level 1, anomaly threshold 5, default CRS settings: blocked (1 of 1 requests blocked), template CVE-2021-22911, 2026-11-02
- OWASP Core Rule Set 4.25.0, paranoia level 2, anomaly threshold 5, default CRS settings: blocked (1 of 1 requests blocked), template CVE-2021-22911, 2026-11-02

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2021-22911 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2021-22911