Unrated severityNVD Advisory· Published Jul 10, 2025· Updated Nov 4, 2025
Apache HTTP Server: mod_ssl error log variable escaping
CVE-2024-47252
Description
Insufficient escaping of user-supplied data in mod_ssl in Apache HTTP Server 2.4.63 and earlier allows an untrusted SSL/TLS client to insert escape characters into log files in some configurations.
In a logging configuration where CustomLog is used with "%{varname}x" or "%{varname}c" to log variables provided by mod_ssl such as SSL_TLS_SNI, no escaping is performed by either mod_log_config or mod_ssl and unsanitized data provided by the client may appear in log files.
Affected products
2- Range: <=2.4.63
- Apache Software Foundation/Apache HTTP Serverv5Range: 2.4
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1- httpd.apache.org/security/vulnerabilities_24.htmlmitrevendor-advisory
News mentions
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