Apache Log4cxx up to 1.4.x JSONLayout neutralization for logs

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Apache Log4cxx up to 1.4.x. This issue affects some unknown processing of the component JSONLayout. This manipulation causes neutralization for logs. This vulnerability is tracked as CVE-2025-54813. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Apache Log4cxx up to 1.4.x. It has been declared as problematic. Affected by this vulnerability is some unknown functionality of the component JSONLayout. The manipulation with an unknown input leads to a neutralization for logs vulnerability. The CWE definition for the vulnerability is CWE-117. The product does not neutralize or incorrectly neutralizes output that is written to logs. As an impact it is known to affect integrity. The summary by CVE is:

Improper Output Neutralization for Logs vulnerability in Apache Log4cxx. When using JSONLayout, not all payload bytes are properly escaped. If an attacker-supplied message contains certain non-printable characters, these will be passed along in the message and written out as part of the JSON message. This may prevent applications that consume these logs from correctly interpreting the information within them. This issue affects Apache Log4cxx: before 1.5.0. Users are recommended to upgrade to version 1.5.0, which fixes the issue.

It is possible to read the advisory at logging.apache.org. This vulnerability is known as CVE-2025-54813 since 07/30/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/03/2025).

The vulnerability scanner Nessus provides a plugin with the ID 266592 (Debian dla-4322 : liblog4cxx-dev - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.5.0 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (266592) and EUVD (EUVD-2025-25622). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Neutralization for logs
CWE: CWE-117 / CWE-116 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 266592
Nessus Name: Debian dla-4322 : liblog4cxx-dev - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Log4cxx 1.5.0
Patch: github.com

Timelineinfo

07/30/2025 CVE reserved
08/22/2025 +23 days Advisory disclosed
08/22/2025 +0 days VulDB entry created
11/03/2025 +73 days VulDB entry last update

Sourcesinfo

Vendor: apache.org

Advisory: logging.apache.org
Status: Confirmed

CVE: CVE-2025-54813 (🔒)
GCVE (CVE): GCVE-0-2025-54813
GCVE (VulDB): GCVE-100-321127
EUVD: 🔒

Entryinfo

Created: 08/22/2025 23:41
Updated: 11/03/2025 19:33
Changes: 08/22/2025 23:41 (67), 08/26/2025 09:08 (1), 08/27/2025 11:07 (11), 10/05/2025 12:57 (2), 11/03/2025 19:33 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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