CVE-2023-4537Network attack vector

Traffic interception via accepted MS SQL downgrade

Published Feb 15, 2024 · Updated Oct 10, 2024

Protocol downgrade in Comarch ERP XL 2020.2.2 through 2023.2 allows remote attackers to intercept and modify database traffic. The ERP XL client accepts a server-originated MS SQL protocol downgrade request and continues the database session without encryption. Exploitation requires a position capable of supplying the server response, exposing in-transit data to reading and modification.

CVSS severity7.4
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Protocol downgrade in Comarch ERP XL 2020.2.2 through 2023.2 allows remote attackers to intercept and modify database traffic. The ERP XL client accepts a server-originated MS SQL protocol downgrade request and continues the database session without encryption. Exploitation requires a position capable of supplying the server response, exposing in-transit data to reading and modification.

The record

CVE
CVE-2023-4537
Published
Feb 15, 2024
Updated
Oct 10, 2024
Vendor
Comarch
Product
Comarch ERP XL
Classifications
CWE-755, CAPEC-569, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 10, 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=2020.2.2 <=2023.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Comarch · Comarch ERP XLversion=2020.2.2 <=2023.2

Published CVSS scores

7.4CERT.PLCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-755Improper Handling of Exceptional Conditions
CAPEC-569Collect Data as Provided by Users
T1557Adversary-in-the-Middle

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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