CVE-2023-23911Network attack vector

Chat confidentiality compromise via unauthorized group-key change

Published Mar 10, 2023 · Updated Feb 28, 2025

Improper access control in Rocket.Chat before 6.0.0 allows remote attackers to compromise end-to-end encrypted chat confidentiality. The group-key update path accepts a user-supplied replacement key without enforcing the authorization needed to control that room's E2EE key. An E2EE-enabled room and access to its group-key update operation are required; successful abuse undermines message confidentiality.

CVSS severity7.5
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Rocket.Chat before 6.0.0 allows remote attackers to compromise end-to-end encrypted chat confidentiality. The group-key update path accepts a user-supplied replacement key without enforcing the authorization needed to control that room's E2EE key. An E2EE-enabled room and access to its group-key update operation are required; successful abuse undermines message confidentiality.

The record

CVE
CVE-2023-23911
Published
Mar 10, 2023
Updated
Feb 28, 2025
Vendor
Rocket.Chat Technologies Corp.
Product
Rocket.Chat
Classifications
CWE-284
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=fixed version => 6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rocket.Chat Technologies Corp. · Rocket.Chatversion=fixed version => 6.0

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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