CVE-2023-49957Public exploitNetwork attack vector

Billing manipulation via duplicate active charging transactions

Published Dec 7, 2023 · Updated Aug 2, 2024

Business-logic error in Dalmann OCPP.Core before 1.3.0 allows remote attackers to create concurrent charging transactions. The OCPP server accepts a second StartTransaction request for an active idTag instead of returning the required ConcurrentTx status. Unauthenticated network access to a configured OCPP endpoint is the gate; duplicate transactions undermine billing and transaction integrity, although the vendor disputes that parallel charging under one token should be rejected.

CVSS severity7.5
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Business-logic error in Dalmann OCPP.Core before 1.3.0 allows remote attackers to create concurrent charging transactions. The OCPP server accepts a second StartTransaction request for an active idTag instead of returning the required ConcurrentTx status. Unauthenticated network access to a configured OCPP endpoint is the gate; duplicate transactions undermine billing and transaction integrity, although the vendor disputes that parallel charging under one token should be rejected.

The record

CVE
CVE-2023-49957
Published
Dec 7, 2023
Updated
Aug 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1565.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 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

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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.

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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

T1565.002Transmitted Data Manipulation

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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