CVE-2023-41034 | DDFFileParser in eclipse leshan is vulnerable to XXE Attacks

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.

Published: 2023-08-31 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-41034 is rated Moderate Risk (41.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.57%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-41034

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.11% 0.57% +0.46%
2 2025-11-21 0.36% 0.11% -0.25%
3 2025-11-18 — 0.36% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-41034

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 4.2 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2023-41034

GitHub Security Advisory for CVE-2023-41034

GHSA-wc9j-gc65-3cm7 · Severity: medium · Ecosystem: maven — DDFFileParser is vulnerable to XXE Attacks

Affected software / configurations for CVE-2023-41034

Vendor Product Version Raw CPE
eclipse leshan < 1.5.0 cpe:2.3:a:eclipse:leshan:*:*:*:*:*:*:*:*
eclipse leshan 2.0.0 cpe:2.3:a:eclipse:leshan:2.0.0:milestone1:*:*:*:*:*:*
eclipse leshan 2.0.0 cpe:2.3:a:eclipse:leshan:2.0.0:milestone10:*:*:*:*:*:*
eclipse leshan 2.0.0 cpe:2.3:a:eclipse:leshan:2.0.0:milestone11:*:*:*:*:*:*
eclipse leshan 2.0.0 cpe:2.3:a:eclipse:leshan:2.0.0:milestone12:*:*:*:*:*:*
eclipse leshan 2.0.0 cpe:2.3:a:eclipse:leshan:2.0.0:milestone2:*:*:*:*:*:*
eclipse leshan 2.0.0 cpe:2.3:a:eclipse:leshan:2.0.0:milestone3:*:*:*:*:*:*
eclipse leshan 2.0.0 cpe:2.3:a:eclipse:leshan:2.0.0:milestone4:*:*:*:*:*:*
eclipse leshan 2.0.0 cpe:2.3:a:eclipse:leshan:2.0.0:milestone5:*:*:*:*:*:*
eclipse leshan 2.0.0 cpe:2.3:a:eclipse:leshan:2.0.0:milestone6:*:*:*:*:*:*
eclipse leshan 2.0.0 cpe:2.3:a:eclipse:leshan:2.0.0:milestone7:*:*:*:*:*:*
eclipse leshan 2.0.0 cpe:2.3:a:eclipse:leshan:2.0.0:milestone8:*:*:*:*:*:*
eclipse leshan 2.0.0 cpe:2.3:a:eclipse:leshan:2.0.0:milestone9:*:*:*:*:*:*

References for CVE-2023-41034

cvelogic Threat Intelligence