CVE-2023-26855Network attack vector

Password cracking via predictable person-ID salts

Published Apr 4, 2023 · Updated Feb 13, 2025

Insufficiently random password salting in ChurchCRM 4.5.3 allows attackers to crack stored password hashes through offline attacks. The User::getPasswordHash method concatenates each password with the integer person ID and applies raw SHA-256, making the salt predictable rather than randomly generated. Exploitation requires access to stored hashes; recovered passwords can enable unauthorized account access and disclosure of account-accessible data.

CVSS severity7.5
High
EPSS probability0.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficiently random password salting in ChurchCRM 4.5.3 allows attackers to crack stored password hashes through offline attacks. The User::getPasswordHash method concatenates each password with the integer person ID and applies raw SHA-256, making the salt predictable rather than randomly generated. Exploitation requires access to stored hashes; recovered passwords can enable unauthorized account access and disclosure of account-accessible data.

The record

CVE
CVE-2023-26855
Published
Apr 4, 2023
Updated
Feb 13, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-330, T1110.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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?

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

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

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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-330Use of Insufficiently Random Values
T1110.002Password Cracking

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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