CVE-2018-19052

Name: CVE-2018-19052
Creator: NVD / NIST
Published: 2018-11-07T05:29:00.343+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 14.08%

Last modified Jun 17, 2026

CVE-2018-19052 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in mod_alias_physical_handler in mod_alias.c in lighttpd before 1.4.50. There is potential ../ path traversal of a single directory above an alias target, with a specific mod_alias configuration where the matched alias lacks a trailing '/' character, but the alias target filesystem path does have a trailing '/' character.. EPSS estimates a 14.08% chance of exploitation in the next 30 days.

Description

An issue was discovered in mod_alias_physical_handler in mod_alias.c in lighttpd before 1.4.50. There is potential ../ path traversal of a single directory above an alias target, with a specific mod_alias configuration where the matched alias lacks a trailing '/' character, but the alias target filesystem path does have a trailing '/' character.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

14.08%

96.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions	Update
Lighttpd	Lighttpd	< 1.4.50	—
Opensuse	Backports Sle	15.0	—
Opensuse	Leap	15.0	—
Opensuse	Leap	15.1	—
Suse	Suse Linux Enterprise Server	11	Sp3
Suse	Suse Linux Enterprise Server	12	—
Debian	Debian Linux	9.0	—

References

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00054.htmlMailing List, Third Party Advisory
https://github.com/lighttpd/lighttpd1.4/commit/2105dae0f9d7a964375ce681e53cb165375f84c1Exploit, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/01/msg00012.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00054.htmlMailing List, Third Party Advisory
https://github.com/lighttpd/lighttpd1.4/commit/2105dae0f9d7a964375ce681e53cb165375f84c1Exploit, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/01/msg00012.htmlMailing List, Third Party Advisory

Timeline

Published: Nov 7, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-19052?

How severe is CVE-2018-19052?

CVE-2018-19052 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 14.08% probability of exploitation in the next 30 days.

How do I fix CVE-2018-19052?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-19052?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST