CVE-2019-10098

MEDIUM EXPLOITED NUCLEI

Apache HTTP Server 2.4.0-2.4.39 - Open Redirect via Encoded Newlines in mod_rewrite

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2019-10098 has been observed exploited in the wild (reported by VulnCheck KEV). EIP tracks 1 public exploit from researchers including Sebastian Neef. A Nuclei detection template is also available.

AI-analyzed exploit summary This exploit demonstrates a URL redirection vulnerability (CVE-2019-10098) where newline characters (%0a) in the URL path can bypass intended redirection logic, allowing an attacker to redirect users to arbitrary domains. The provided curl command shows the vulnerability in action, with the server responding with a 302 redirect to an unintended domain.

Description

In Apache HTTP server 2.4.0 to 2.4.39, Redirects configured with mod_rewrite that were intended to be self-referential might be fooled by encoded newlines and redirect instead to an unexpected URL within the request URL.

Exploits (1)

exploitdb WORKING POC
by Sebastian Neef · webappsmultiple
https://www.exploit-db.com/exploits/47689

This exploit demonstrates a URL redirection vulnerability (CVE-2019-10098) where newline characters (%0a) in the URL path can bypass intended redirection logic, allowing an attacker to redirect users to arbitrary domains. The provided curl command shows the vulnerability in action, with the server responding with a 302 redirect to an unintended domain.

Classification
Working Poc 90%
Attack Type
Other
Complexity
Trivial
Reliability
Reliable
Target: Unknown (likely a web server or proxy handling redirects)
No auth needed
Prerequisites: Access to a vulnerable web server or proxy handling redirects
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Nuclei Templates (1)

Apache HTTP server v2.4.0 to v2.4.39 - Open Redirect
MEDIUMby ctflearner
Shodan: cpe:"cpe:2.3:a:apache:http_server" || apache 2.4.49

References (17)

Core 17
Core References
Mailing List mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2020/04/01/4

Scores

CVSS v3 6.1
EPSS 0.7398
EPSS Percentile 99.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Details

VulnCheck KEV 2022-02-22
CWE
CWE-601
Status published
Products (1)
apache/http_server 2.4.0 - 2.4.39
Published Sep 25, 2019
Tracked Since Feb 18, 2026