CVE-2024-47252
HIGHApache HTTP Server: mod_ssl error log variable escaping
CVSS v3
7.5
HIGH
EPSS Score
0.7%
exploit probability
CISA KEV
No
known exploited
Exploitation
none
SSVC status
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.
Technical Details
- CVSS v3 Vector
- 3.1
- Published
- 7/10/2025
- Last Modified
- 11/4/2025
Frequently Asked Questions
What is CVE-2024-47252?
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.
Is CVE-2024-47252 actively exploited?
Active exploitation of CVE-2024-47252 has not been confirmed. The EPSS score is 0.7%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2024-47252?
CVE-2024-47252 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string 3.1.
Is CVE-2024-47252 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.