How severe is CVE-2023-41034?

CVE-2023-41034 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2023-41034 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-41034?

CVE-2023-41034 primarily affects Eclipse Leshan. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-41034?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-41034 published?

CVE-2023-41034 was published on 2023-08-31 and last updated on 2026-06-17.

CVE-2023-41034

CVE-2023-41034 is a medium-severity vulnerability in Eclipse Leshan with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-611.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Eclipse Leshan
Published: 2023-08-31
Last modified: 2026-06-17

Description

Eclipse Leshan is a device management server and client Java implementation. In affected versions DDFFileParser` and `DefaultDDFFileValidator` (and so `ObjectLoader`) are vulnerable to `XXE Attacks`. A DDF file is a LWM2M format used to store LWM2M object description. Leshan users are impacted only if they parse untrusted DDF files (e.g. if they let external users provide their own model), in that case they MUST upgrade to fixed version. If you parse only trusted DDF file and validate only with trusted xml schema, upgrading is not mandatory. This issue has been fixed in versions 1.5.0 and 2.0.0-M13. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Frequently asked questions

What is CVE-2023-41034?: Eclipse Leshan is a device management server and client Java implementation. In affected versions DDFFileParser` and `DefaultDDFFileValidator` (and so `ObjectLoader`) are vulnerable to `XXE Attacks`. A DDF file is a LWM2M format used to store LWM2M object description. Leshan users are impacted only if they parse untrusted DDF files (e.g. if they let external users provide their own model), in that case they MUST upgrade to fixed version. If you parse only trusted DDF file and validate only with trusted xml schema, upgrading is not mandatory. This issue has been fixed in versions 1.5.0 and 2.0.0-M13. Users are advised to upgrade. There are no known workarounds for this vulnerability.
How severe is CVE-2023-41034?: CVE-2023-41034 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2023-41034 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-41034?: CVE-2023-41034 primarily affects Eclipse Leshan. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-41034?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-41034 published?: CVE-2023-41034 was published on 2023-08-31 and last updated on 2026-06-17.

References

Affected products (13)

cpe:2.3:a:eclipse:leshan:*:*:*:*:*:*:*:*
cpe:2.3:a:eclipse:leshan:2.0.0:milestone1:*:*:*:*:*:*
cpe:2.3:a:eclipse:leshan:2.0.0:milestone10:*:*:*:*:*:*
cpe:2.3:a:eclipse:leshan:2.0.0:milestone11:*:*:*:*:*:*
cpe:2.3:a:eclipse:leshan:2.0.0:milestone12:*:*:*:*:*:*
cpe:2.3:a:eclipse:leshan:2.0.0:milestone2:*:*:*:*:*:*
cpe:2.3:a:eclipse:leshan:2.0.0:milestone3:*:*:*:*:*:*
cpe:2.3:a:eclipse:leshan:2.0.0:milestone4:*:*:*:*:*:*
cpe:2.3:a:eclipse:leshan:2.0.0:milestone5:*:*:*:*:*:*
cpe:2.3:a:eclipse:leshan:2.0.0:milestone6:*:*:*:*:*:*
cpe:2.3:a:eclipse:leshan:2.0.0:milestone7:*:*:*:*:*:*
cpe:2.3:a:eclipse:leshan:2.0.0:milestone8:*:*:*:*:*:*
cpe:2.3:a:eclipse:leshan:2.0.0:milestone9:*:*:*:*:*:*

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