Vulnerability-Lookup

ubuntu-cve-2025-54812

Vulnerability from osv_ubuntu

Published

2025-08-22 19:15

Modified

2026-05-20 15:22

Summary

Details

Improper Output Neutralization for Logs vulnerability in Apache Log4cxx. When using HTMLLayout, logger names are not properly escaped when writing out to the HTML file. If untrusted data is used to retrieve the name of a logger, an attacker could theoretically inject HTML or Javascript in order to hide information from logs or steal data from the user. In order to activate this, the following sequence must occur: * Log4cxx is configured to use HTMLLayout. * Logger name comes from an untrusted string * Logger with compromised name logs a message * User opens the generated HTML log file in their browser, leading to potential XSS Because logger names are generally constant strings, we assess the impact to users as LOW This issue affects Apache Log4cxx: before 1.5.0. Users are recommended to upgrade to version 1.5.0, which fixes the issue.

Severity

2.1 (Low)


                    
                      CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

5.4 (Medium)


                    
                      CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2025-54812	REPORT
	https://www.cve.org/CVERecord?id=CVE-2025-54812	REPORT
	https://logging.apache.org/security.html#CVE-2025-54812	REPORT
	https://github.com/apache/logging-log4cxx/pull/509	REPORT
	https://github.com/apache/logging-log4cxx/commit/…	REPORT
	https://github.com/apache/logging-log4cxx/pull/514	REPORT
	https://github.com/apache/logging-log4cxx/commit/…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liblog4cxx10",
            "binary_version": "0.10.0-1.2ubuntu3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "log4cxx",
        "purl": "pkg:deb/ubuntu/log4cxx@0.10.0-1.2ubuntu3?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10.0-1.2ubuntu3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liblog4cxx10v5",
            "binary_version": "0.10.0-10ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "log4cxx",
        "purl": "pkg:deb/ubuntu/log4cxx@0.10.0-10ubuntu1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10.0-9ubuntu1",
        "0.10.0-9ubuntu2",
        "0.10.0-10ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liblog4cxx10v5",
            "binary_version": "0.10.0-13ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "log4cxx",
        "purl": "pkg:deb/ubuntu/log4cxx@0.10.0-13ubuntu2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10.0-12ubuntu1",
        "0.10.0-13ubuntu1",
        "0.10.0-13ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liblog4cxx10v5",
            "binary_version": "0.10.0-15ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "log4cxx",
        "purl": "pkg:deb/ubuntu/log4cxx@0.10.0-15ubuntu2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.10.0-15ubuntu1",
        "0.10.0-15ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liblog4cxx12",
            "binary_version": "0.12.1-4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "log4cxx",
        "purl": "pkg:deb/ubuntu/log4cxx@0.12.1-4?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.11.0-2ubuntu1",
        "0.11.0-3ubuntu2",
        "0.12.1-4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liblog4cxx15",
            "binary_version": "1.1.0-1build3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "log4cxx",
        "purl": "pkg:deb/ubuntu/log4cxx@1.1.0-1build3?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.0-1",
        "1.1.0-1build1",
        "1.1.0-1build2",
        "1.1.0-1build3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liblog4cxx15",
            "binary_version": "1.4.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "log4cxx",
        "purl": "pkg:deb/ubuntu/log4cxx@1.4.0-1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.1-1",
        "1.4.0-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "liblog4cxx15",
            "binary_version": "1.5.0-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "log4cxx",
        "purl": "pkg:deb/ubuntu/log4cxx@1.5.0-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.4.0-1",
        "1.5.0-1"
      ]
    }
  ],
  "aliases": [],
  "details": "Improper Output Neutralization for Logs vulnerability in Apache Log4cxx. When using HTMLLayout, logger names are not properly escaped when writing out to the HTML file. If untrusted data is used to retrieve the name of a logger, an attacker could theoretically inject HTML or Javascript in order to hide information from logs or steal data from the user. In order to activate this, the following sequence must occur:   *  Log4cxx is configured to use HTMLLayout.   *  Logger name comes from an untrusted string   *  Logger with compromised name logs a message   *  User opens the generated HTML log file in their browser, leading to potential XSS Because logger names are generally constant strings, we assess the impact to users as LOW This issue affects Apache Log4cxx: before 1.5.0. Users are recommended to upgrade to version 1.5.0, which fixes the issue.",
  "id": "UBUNTU-CVE-2025-54812",
  "modified": "2026-05-20T15:22:55Z",
  "published": "2025-08-22T19:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-54812"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-54812"
    },
    {
      "type": "REPORT",
      "url": "https://logging.apache.org/security.html#CVE-2025-54812"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/apache/logging-log4cxx/pull/509"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/apache/logging-log4cxx/commit/1c599de956ae9eedd8b5e3f744bfb867c39e8bba"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/apache/logging-log4cxx/pull/514"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/apache/logging-log4cxx/commit/36d829e9f6c3f9f4f9a42e22df326a9ed7b6e373"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2025-54812"
  ]
}

CVE-2025-54812 (GCVE-0-2025-54812)

Vulnerability from cvelistv5 – Published: 2025-08-22 18:46 – Updated: 2025-11-04 21:12

Title

Apache Log4cxx: Improper HTML escaping in HTMLLayout

Summary

Severity

2.1 (Low)


                        
                          CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-08-22 19:07 UTC

CWE

CWE-117 - Improper Output Neutralization for Logs

Assigner

apache mitre root

References

5 references

URL	Tags
https://logging.apache.org/security.html#CVE-2025-54812	vendor-advisory
https://github.com/apache/logging-log4cxx/pull/509	patch
https://github.com/apache/logging-log4cxx/pull/514	patch
https://lists.debian.org/debian-lts-announce/2025…
http://www.openwall.com/lists/oss-security/2025/08/22/2

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Log4cxx	Affected: 0 , < 1.5.0 (semver)

Credits

Sovereign Tech Agency

Show details on NVD website

JSON

To clipboard

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          "product": "Apache Log4cxx",
          "vendor": "Apache Software Foundation",
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      "credits": [
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.