CVE-2023-34839Public exploitNetwork attack vector

Administrator account creation via unvalidated cross-origin request

Published Jun 27, 2023 · Updated Dec 2, 2024

CSRF in Issabel PBX 4.0.0-6 allows remote attackers to create an administrator account through a victim administrator's session. The user-management endpoint accepts a cross-origin POST to create a user without validating an anti-CSRF token, Origin, or Referer. Exploitation requires an authenticated administrator to visit attacker-controlled content, after which the new account grants persistent administrative access.

CVSS severity6.8
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in Issabel PBX 4.0.0-6 allows remote attackers to create an administrator account through a victim administrator's session. The user-management endpoint accepts a cross-origin POST to create a user without validating an anti-CSRF token, Origin, or Referer. Exploitation requires an authenticated administrator to visit attacker-controlled content, after which the new account grants persistent administrative access.

The record

CVE
CVE-2023-34839
Published
Jun 27, 2023
Updated
Dec 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-352, T1136
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Dec 2, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1136Create Account

Public exploit references

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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