CVE-2021-22911

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because EPSS predicts 92% probability of exploitation within the next 30 days (top 0.3% of all CVEs). NVD baseline CVSS 9.8 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, ghsa, nvd
Weaponized
9.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 95%
CISA-KEV: Not listedEPSS: 95%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
99.9%
KEV
Not listed

Published

May 27, 2021

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated May 26, 2026
Patch available.
generic

HackerOne

https://hackerone.com/reports/1130721
generic Patch Available

NoSQL Injections in Rocket.Chat 3.12.1: How A Small Leak Grounds A Rocket | Sonar

https://blog.sonarsource.com/nosql-injections-in-rocket-chat

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 2× in last 7d / 13× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-18 19:29 UTCOSV refresh
  2. 2026-07-15 01:57 UTCEPSS rescore
  3. 2026-07-13 06:10 UTCEPSS rescore
  4. 2026-07-13 06:10 UTCEPSS rescore
  5. 2026-07-12 05:44 UTCEPSS rescore
  6. 2026-07-12 05:44 UTCEPSS rescore
  7. 2026-07-08 15:12 UTCEPSS rescore
  8. 2026-07-01 15:03 UTCEPSS rescore
  9. 2026-07-01 02:48 UTCOSV refresh
  10. 2026-06-24 14:03 UTCEPSS rescore
  11. 2026-06-24 14:03 UTCEPSS rescore
  12. 2026-06-23 21:31 UTCEPSS rescore
  13. 2026-06-23 21:31 UTCEPSS rescore
  14. 2026-06-17 17:51 UTCEPSS rescore
  15. 2026-06-15 17:46 UTCEPSS rescore
  16. 2026-06-13 22:58 UTCEPSS rescore
  17. 2026-06-13 04:43 UTCOSV refresh
  18. 2026-06-12 23:10 UTCEPSS rescore
  19. 2026-06-12 23:10 UTCEPSS rescore
  20. 2026-06-10 22:16 UTCEPSS rescore
  21. 2026-06-10 22:16 UTCEPSS rescore
  22. 2026-06-10 13:20 UTCEPSS rescore
  23. 2026-06-08 14:15 UTCEPSS rescore
  24. 2026-06-08 14:15 UTCEPSS rescore
  25. 2026-06-01 13:50 UTCEPSS rescore
Show 9 more
  1. 2026-06-01 13:50 UTCEPSS rescore
  2. 2026-05-29 13:42 UTCEPSS rescore
  3. 2026-05-28 13:43 UTCEPSS rescore
  4. 2026-05-28 13:43 UTCEPSS rescore
  5. 2026-05-26 16:00 UTCEG score recompute
  6. 2026-05-26 16:00 UTCGHSA enrichment
  7. 2026-05-26 07:17 UTCEPSS rescore
  8. 2026-05-26 07:17 UTCEPSS rescore
  9. 2026-05-25 07:07 UTCOSV refresh

Publicly available exploits

(6 references)

Working exploit code is in the public domain (3 GitHub PoCs) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCFaridi-m/CVE-2021-22911-RocketChat
    First seen Mar 4, 2026
    Open source ↗
  • GitHub PoCoptionalCTF/Rocket.Chat-Automated-Account-Takeover-RCE-CVE-2021-22911
    First seen Jul 30, 2021

    Full unauthenticated RCE proof of concept for Rocket.Chat 3.12.1 CVE-2021-22911

    Open source ↗
  • Exploit-DBEDB-50108✓ verified
    First seen Jul 7, 2021

    Rocket.Chat 3.12.1 - NoSQL Injection to RCE (Unauthenticated) (2)

    Open source ↗
  • Exploit-DBEDB-49960✓ verified
    First seen Jun 7, 2021

    Rocket.Chat 3.12.1 - NoSQL Injection (Unauthenticated)

    Open source ↗
  • GitHub PoCCsEnox/CVE-2021-22911
    First seen Jun 5, 2021

    Pre-Auth Blind NoSQL Injection leading to Remote Code Execution in Rocket Chat 3.12.1

    Open source ↗
  • Nucleihttp/cves/2021/CVE-2021-22911.yaml
    First seen Jan 1, 2021

    Rocket.Chat <=3.13 - NoSQL Injection

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-22911?
CVE-2021-22911 is a critical vulnerability published on May 27, 2021. 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.
When was CVE-2021-22911 disclosed?
CVE-2021-22911 was first published in the National Vulnerability Database on May 27, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-22911 actively exploited?
CVE-2021-22911 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-22911?
CVE-2021-22911 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-22911?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-22911, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2021-22911

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