CVE-2023-3253Network attack vector

User-account list disclosure to low-privileged users

Published Aug 29, 2023 · Updated Oct 28, 2024

Improper authorization in Tenable Nessus 10.5.4 and earlier allows remote authenticated users to view every application user account. Tenable has not disclosed the affected endpoint or the authorization check that fails when the user list is requested. Any low-privileged application account can enumerate usernames remotely, exposing account information without reported modification or service-interruption capabilities.

CVSS severity4.3
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Tenable Nessus 10.5.4 and earlier allows remote authenticated users to view every application user account. Tenable has not disclosed the affected endpoint or the authorization check that fails when the user list is requested. Any low-privileged application account can enumerate usernames remotely, exposing account information without reported modification or service-interruption capabilities.

The record

CVE
CVE-2023-3253
Published
Aug 29, 2023
Updated
Oct 28, 2024
Vendor
Tenable
Product
Nessus
Classifications
CWE-863, T1087
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 28, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <10.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Tenable · Nessusversion=0 <10.6.0

Published CVSS scores

3.8TenableCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C
4.3TenableCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1087Account Discovery

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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