High severity · published Jul 10, 2025
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…
7.5
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HS
HTTP Server · Apache
2.4.0 before 2.4.64 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-47252
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-47252
Vendor Advisory
https://httpd.apache.org/security/vulnerabilities_24.html
www.openwall.com
http://www.openwall.com/lists/oss-security/2025/07/10/2
www.openwall.com
http://www.openwall.com/lists/oss-security/2025/07/10/6
lists.debian.org
https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html
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