How severe is CVE-2023-49955?

CVE-2023-49955 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-49955 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-49955?

CVE-2023-49955 affects Dallmann-consulting Open Charge Point Protocol. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-49955?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-49955 published?

CVE-2023-49955 was published on 2023-12-07 and last updated on 2026-06-17.

CVE-2023-49955

CVE-2023-49955 is a high-severity vulnerability in Dallmann-consulting Open Charge Point Protocol with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Dallmann-consulting Open Charge Point Protocol
Published: 2023-12-07
Last modified: 2026-06-17

Description

An issue was discovered in Dalmann OCPP.Core before 1.2.0 for OCPP (Open Charge Point Protocol) for electric vehicles. It does not validate the length of the chargePointVendor field in a BootNotification message, potentially leading to server instability and a denial of service when processing excessively large inputs. NOTE: the vendor's perspective is "OCPP.Core is intended for use in a protected environment/network."

Frequently asked questions

What is CVE-2023-49955?: An issue was discovered in Dalmann OCPP.Core before 1.2.0 for OCPP (Open Charge Point Protocol) for electric vehicles. It does not validate the length of the chargePointVendor field in a BootNotification message, potentially leading to server instability and a denial of service when processing excessively large inputs. NOTE: the vendor's perspective is "OCPP.Core is intended for use in a protected environment/network."
How severe is CVE-2023-49955?: CVE-2023-49955 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-49955 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-49955?: CVE-2023-49955 affects Dallmann-consulting Open Charge Point Protocol. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-49955?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-49955 published?: CVE-2023-49955 was published on 2023-12-07 and last updated on 2026-06-17.

References

https://github.com/dallmann-consulting/OCPP.Core/issues/32

Affected products (1)

cpe:2.3:a:dallmann-consulting:open_charge_point_protocol:*:*:*:*:*:*:*:*

More vulnerabilities in Dallmann-consulting Open Charge Point Protocol

CVE-2023-49958 — High (CVSS 7.5): An issue was discovered in Dalmann OCPP.Core through 1.2.0 for OCPP (Open Charge Point Protocol) for electric vehicles.…
CVE-2023-49957 — High (CVSS 7.5): An issue was discovered in Dalmann OCPP.Core before 1.3.0 for OCPP (Open Charge Point Protocol) for electric vehicles.…
CVE-2023-49956 — High (CVSS 7.5): An issue was discovered in Dalmann OCPP.Core before 1.3.0 for OCPP (Open Charge Point Protocol) for electric vehicles.…

All CVEs affecting Dallmann-consulting Open Charge Point Protocol →