CVE-2023-49957

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-12-07 · updated 2026-06-17

Description

An issue was discovered in Dalmann OCPP.Core before 1.3.0 for OCPP (Open Charge Point Protocol) for electric vehicles. It permits multiple transactions with the same connectorId and idTag, contrary to the expected ConcurrentTx status. This could result in critical transaction management and billing errors. NOTE: the vendor's perspective is "Imagine you've got two cars in your family and want to charge both in parallel on the same account/token? Why should that be rejected?"

Affected products

Dallmann-Consulting Open Charge Point Protocol: before 1.3.0 — fixed in 1.3.0

How to fix

Upgrade to a fixed version: Dallmann-Consulting Open Charge Point Protocol 1.3.0. Check the vendor advisory for mitigations.

References

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