CVE-2023-23327Public exploitNetwork attack vector

Backup disclosure via predictable unauthenticated web paths

Published Mar 10, 2023 · Updated Jul 9, 2026

Information disclosure in AvantFAX 3.3.7 allows remote attackers to read fax archives and database backups over HTTP. admin/system_func.php generates date-based archive and schema filenames in /avantfax/tmp, which the web server exposes without access controls. An administrator must first create a backup, but retrieval requires neither authentication nor user interaction and discloses fax content, account data, and MD5 password hashes.

CVSS severity4.9
Medium
EPSS probability0.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in AvantFAX 3.3.7 allows remote attackers to read fax archives and database backups over HTTP. admin/system_func.php generates date-based archive and schema filenames in /avantfax/tmp, which the web server exposes without access controls. An administrator must first create a backup, but retrieval requires neither authentication nor user interaction and discloses fax content, account data, and MD5 password hashes.

The record

CVE
CVE-2023-23327
Published
Mar 10, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-200, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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

4.9CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
4.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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 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-200Exposure of Sensitive Information to an Unauthorized Actor
T1190Exploit Public-Facing Application

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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