CRITICAL
Apache log4net versions before 2.0.10 do not disable XML external entities when parsing log4net configuration files
Published May 11, 2020
9.8
CRITICALCVSS 3.1
EPSS 17.37%
Description
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.
Affected products
- Vendor n/a Product Apache log4net Defaultn/a
- Version Apache log4net up to 2.0.8StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Apache log4net | n/a |
|
Configuration 2
OR
- 30
- 31
- 32
Configuration 3
OR
- 13.3.0.1
- 5.5
- 5.6
- 18.2.7.2
- 19.1.3
Configuration 4
OR
- n/a
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
9.8 CRITICAL NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
No CVSS v3.0 score for this CVE.
7.5 HIGH NVD
AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
17.37% 0.17366
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.17366
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (37 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 17.37% (0.17366) | 97.03th | v5 (v2026.06.15) |
| Jul 12, 2026 | 17.82% (0.17823) | 96.82th | v5 (v2026.06.15) |
| Jun 15, 2026 | 49.84% (0.49839) | 98.75th | v5 (v2026.06.15) |
| Jun 6, 2026 | 67.33% (0.67329) | 98.58th | v4 (v2025.03.14) |
| May 23, 2026 | 65.58% (0.65576) | 98.52th | v4 (v2025.03.14) |
| May 22, 2026 | 67.33% (0.67329) | 98.59th | v4 (v2025.03.14) |
| Apr 19, 2026 | 72.06% (0.72065) | 98.75th | v4 (v2025.03.14) |
| Nov 21, 2025 | 49.02% (0.49024) | 97.63th | v4 (v2025.03.14) |
| Nov 18, 2025 | 20.55% (0.20552) | 95.16th | v4 (v2025.03.14) |
| Oct 13, 2025 | 49.81% (0.49809) | 97.65th | v4 (v2025.03.14) |
| Oct 12, 2025 | 47.38% (0.47377) | 97.53th | v4 (v2025.03.14) |
| Jul 11, 2025 | 49.02% (0.49024) | 97.64th | v4 (v2025.03.14) |
| Jun 20, 2025 | 46.81% (0.46811) | 97.52th | v4 (v2025.03.14) |
| Jun 15, 2025 | 40.50% (0.40502) | 97.17th | v4 (v2025.03.14) |
| Mar 30, 2025 | 49.02% (0.49024) | 97.54th | v4 (v2025.03.14) |
| Mar 29, 2025 | 78.11% (0.78115) | 98.73th | v4 (v2025.03.14) |
| Mar 28, 2025 | 49.02% (0.49024) | 97.54th | v4 (v2025.03.14) |
| Mar 27, 2025 | 80.92% (0.80916) | 99.06th | v4 (v2025.03.14) |
| Mar 20, 2025 | 49.02% (0.49024) | 97.56th | v4 (v2025.03.14) |
| Mar 19, 2025 | 78.11% (0.78115) | 98.96th | v4 (v2025.03.14) |
| Mar 17, 2025 | 49.02% (0.49024) | 97.50th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.04% (0.01039) | 84.61th | v3 (v2023.03.01) |
| Apr 17, 2024 | 0.90% (0.00897) | 82.45th | v3 (v2023.03.01) |
| Apr 1, 2024 | 0.79% (0.00786) | 81.08th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.82% (0.00819) | 81.43th | v3 (v2023.03.01) |
| Nov 8, 2023 | 0.82% (0.00824) | 79.91th | v3 (v2023.03.01) |
| May 8, 2023 | 0.40% (0.00397) | 69.52th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.56% (0.00563) | 74.33th | v3 (v2023.03.01) |
| Mar 6, 2023 | 45.79% (0.45790) | 98.40th | v2 (v2022.01.01) |
| Oct 28, 2022 | 45.79% (0.45790) | 98.32th | v2 (v2022.01.01) |
| Feb 4, 2022 | 35.69% (0.35688) | 96.93th | v2 (v2022.01.01) |
| Feb 3, 2022 | 31.41% (0.31406) | 96.83th | v1 |
| Jan 1, 2022 | 31.41% (0.31406) | 98.54th | v1 |
| Sep 1, 2021 | 9.26% (0.09259) | 93.95th | v1 |
| Aug 18, 2021 | 9.26% (0.09259) | 0.00th | v1 |
| Jun 15, 2021 | 8.73% (0.08728) | 0.00th | v1 |
| Apr 14, 2021 | 8.19% (0.08190) | 0.00th | v1 |
Weaknesses (1)
References (33)
- https://github.com/advisories/GHSA-2cwj-8chv-9pp9 Advisory
- https://issues.apache.org/jira/browse/LOG4NET-575 x_refsource_MISCIssue TrackingVendor Advisory
- https://lists.apache.org/thread.html/r00b16ac5e0bbf7009a0d167ed58f3f94d0033b0f4b3e3d5025cc4872%40%3Cdev.logging.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r00b16ac5e0bbf7009a0d167ed58f3f94d0033b0f4b3e3d5025cc4872@%3Cdev.logging.apache.org%3E
- https://lists.apache.org/thread.html/r33564de316d4e4ba0fea1d4d079e62cde1ffe64369c1157243d840d9%40%3Cdev.logging.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r33564de316d4e4ba0fea1d4d079e62cde1ffe64369c1157243d840d9@%3Cdev.logging.apache.org%3E
- https://lists.apache.org/thread.html/r525cbbd7db0aef4a114cf60de8439aa285decc34904d42a7f14f39c3%40%3Cdev.logging.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r525cbbd7db0aef4a114cf60de8439aa285decc34904d42a7f14f39c3@%3Cdev.logging.apache.org%3E
- https://lists.apache.org/thread.html/r6543acafca3e2d24ff4b0c364a91540cb9378977ffa8d37a03ab4b0f%40%3Cdev.logging.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r6543acafca3e2d24ff4b0c364a91540cb9378977ffa8d37a03ab4b0f@%3Cdev.logging.apache.org%3E
- https://lists.apache.org/thread.html/r7ab6b6e702f11a6f77b0db2af2d5e5532f56ae4b99b5fe73c5200b6a%40%3Cdev.logging.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r7ab6b6e702f11a6f77b0db2af2d5e5532f56ae4b99b5fe73c5200b6a@%3Cdev.logging.apache.org%3E
- https://lists.apache.org/thread.html/r9de86a185575e6c5f92e2a70a1d2e2e9514dc4341251577aac8e3866%40%3Cdev.logging.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r9de86a185575e6c5f92e2a70a1d2e2e9514dc4341251577aac8e3866@%3Cdev.logging.apache.org%3E
- https://lists.apache.org/thread.html/rd2d72a017e238d1f345f9d14e075c81be16fc68a41c9e9ad9e29a732%40%3Cdev.logging.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rd2d72a017e238d1f345f9d14e075c81be16fc68a41c9e9ad9e29a732@%3Cdev.logging.apache.org%3E
- https://lists.apache.org/thread.html/rdbac24c945ca5c69cd5348b5ac023bc625768f653335de146e09ae2d%40%3Cdev.logging.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rdbac24c945ca5c69cd5348b5ac023bc625768f653335de146e09ae2d@%3Cdev.logging.apache.org%3E
- https://lists.apache.org/thread.html/reab1c277c95310bad1038255e0757857b2fbe291411b4fa84552028a%40%3Cdev.logging.apache.org%3E x_refsource_MISCMailing ListVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M2U233HVAQDSZ2PRG4XSGDASLY3J6ALH/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VKL2LPINAI6BCMXOH4V4HVHGLUXIWOFO/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VT2DNNSW7C7FNK3MA3SLEUHGW5USYZKE/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M2U233HVAQDSZ2PRG4XSGDASLY3J6ALH/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VKL2LPINAI6BCMXOH4V4HVHGLUXIWOFO/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VT2DNNSW7C7FNK3MA3SLEUHGW5USYZKE/
- https://nvd.nist.gov/vuln/detail/CVE-2018-1285
- https://security.netapp.com/advisory/ntap-20220909-0001/ x_refsource_CONFIRMThird Party Advisory
- https://snyk.io/vuln/SNYK-DOTNET-LOG4NET-568897
- https://www.nuget.org/packages/log4net/
- https://www.oracle.com/security-alerts/cpuApr2021.html x_refsource_MISCThird Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.html x_refsource_MISCPatchThird Party Advisory
- https://www.oracle.com/security-alerts/cpujan2021.html x_refsource_MISCThird Party Advisory
- https://www.whitesourcesoftware.com/vulnerability-database/CVE-2018-1285
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner apache
Published May 11, 2020
Updated Aug 5, 2024
Reserved Dec 7, 2017
Link CVE-2018-1285
CISA Vulnrichment
GHSA-2CWJ-8CHV-9PP9 Updated n/a