Home/CVE/Apache log4net versions before 2.0.10 do not disable XML external entities when parsing log4net configuration files. Thi
CVE

CVE-2018-1285

Apache log4net versions before 2.0.10 do not disable XML external entities when parsing log4net configuration files. Thi

Apache log4net versions before 2.0.10 do not disable XML external entities when parsing log4net configuration files. This allows for XXE-based attacks in applications that accept attacker-controlled log4net configuration files.

CRITICAL · CVSS 9.8 EPSS 0.65576
Act now
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 1% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-611Improper Restriction of XML External Entity Reference
▤

Affected Products & Versions

7
apache log4net< 2.0.10
fedoraproject fedoraall versions
oracle application testing suiteall versions
oracle hospitality opera 5all versions
oracle hospitality simphonyall versions
netapp manageability software development kitall versions
netapp snapcenterall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
NuGet log4net CRITICAL fixed in 2.0.10
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · security@apache.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD11 May 2020 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

5
suse-csafopenSUSE-SU-2024:12311-1
usnUSN-4699-1
cisa-csafcisa-csaf-csaf_files-OT-white-2023-icsma-23-194-01
cisa-csafcisa-csaf-csaf_files-OT-white-2024-icsa-24-226-02
cisa-csafcisa-csaf-csaf_files-OT-white-2025-icsa-25-142-02
🔗

References & Sources

17
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://issues.apache.org/jira/browse/LOG4NET-575Issue TrackingVendor Advisory
https://lists.apache.org/thread.html/r00b16ac5e0bbf7009a0d167ed58f3f94d0033b0f4b3e3d5025cc4872%40%3Cdev.logging.apache.org%3E
https://lists.apache.org/thread.html/r33564de316d4e4ba0fea1d4d079e62cde1ffe64369c1157243d840d9%40%3Cdev.logging.apache.org%3E
https://lists.apache.org/thread.html/r525cbbd7db0aef4a114cf60de8439aa285decc34904d42a7f14f39c3%40%3Cdev.logging.apache.org%3E
https://lists.apache.org/thread.html/r6543acafca3e2d24ff4b0c364a91540cb9378977ffa8d37a03ab4b0f%40%3Cdev.logging.apache.org%3E
https://lists.apache.org/thread.html/r7ab6b6e702f11a6f77b0db2af2d5e5532f56ae4b99b5fe73c5200b6a%40%3Cdev.logging.apache.org%3E
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