CVE-2024-47252
HIGHDescription
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.
How to fix
This vulnerability affects an unusually large number of packages. The highest-confidence fixes are shown above; the full list is longer. Check the referenced advisories for complete coverage.
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Exploit Intelligence
Moderate risk: more likely to be exploited than 50% of all known CVEs.
References
Related Vulnerabilities
Other CWE-150 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2017-0899 | Critical | 9.8 | 11% | - | Fix |
| CVE-2025-55754 | Critical | 9.6 | 10% | - | Fix |
| CVE-2021-25310 | High | 8.8 | 4.6% | - | - |
| CVE-2020-6932 | Critical | 10.0 | 3.6% | - | - |
| CVE-2024-28085 | Low | 3.3 | 2.2% | - | Fix |
| CVE-2022-30123 | Critical | 10.0 | 1.8% | - | Fix |
Common questions
How do I fix CVE-2024-47252?
Published advisories record a fix for 109 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2024-47252 being actively exploited?
Not that we know of. CVE-2024-47252 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.69% is the estimated probability that it will be exploited in the next 30 days. That is higher than 50% of all scored CVEs.
How severe is CVE-2024-47252?
CVE-2024-47252 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2024-47252 affect?
Published advisories record a fix for apache2 (Debian), httpd (Red Hat / RHEL), httpd (Rocky), httpd-core (Red Hat / RHEL), and 105 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-04.