--- title: "CVE-2024-38475: Apache HTTP Server weakness… | CubePath" description: "Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations…" language: en source: https://cubepath.com/security/cve/CVE-2024-38475 --- # CVE-2024-38475: Apache HTTP Server weakness… | CubePath ## Description Improper escaping of output in mod\_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. Substitutions in server context that use a backreferences or variables as the first segment of the substitution are affected. Some unsafe RewiteRules will be broken by this change and the rewrite flag "UnsafePrefixStat" can be used to opt back in once ensuring the substitution is appropriately constrained. Official description from the CVE record, published by apache. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2024-38475) ## Key data ### CVSS 3.1 Critical 9.1 Score published by CISA-ADP in the CVE record. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | High | Serious or total effect on the secrecy of data. | | Integrity impact | High | Serious or total effect on the trustworthiness of data. | | Availability impact | None | No effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.99957 (99.95% probability) Percentile 99.97% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog Apache HTTP Server Improper Escaping of Output Vulnerability Added to the catalog May 1, 2025 Federal due date May 22, 2025 ### CISA assessment as of May 2, 2025 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable yes Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-116](https://cwe.mitre.org/data/definitions/116.html) Improper Encoding or Escaping of Output ## Affected products Products listed in the CVE record, as the CNA published them. - Apache HTTP Server - affected: 2.4.0 up to 2.4.59 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [httpd.apache.org/security/vulnerabilities\_24.html](https://httpd.apache.org/security/vulnerabilities%5F24.html) vendor-advisory - [security.netapp.com/advisory/ntap-20240712-0001](https://security.netapp.com/advisory/ntap-20240712-0001/) - [blackhat.com/us-24/briefings/schedule/index.html](https://www.blackhat.com/us-24/briefings/schedule/index.html#confusion-attacks-exploiting-hidden-semantic-ambiguity-in-apache-http-server-pre-recorded-40227) - [github.com/apache/httpd/commit/9a6157d1e2f7ab15963020381054…](https://github.com/apache/httpd/commit/9a6157d1e2f7ab15963020381054b48782bc18cf) - [openwall.com/lists/oss-security/2024/07/01/8](http://www.openwall.com/lists/oss-security/2024/07/01/8) - [psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0018](https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2024-0018) ## Timeline 1. ID reserved Jun 17, 2024 2. Record published Jul 1, 2024 3. Added to CISA KEV May 1, 2025 4. Record last updated Nov 3, 2025 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:03 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)