CVE-2020-11985

Name: CVE-2020-11985
Creator: NVD / NIST
Published: 2020-08-07T16:15:11.81+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 5.88%

Last modified Jun 17, 2026

CVE-2020-11985 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. IP address spoofing when proxying using mod_remoteip and mod_rewrite For configurations using proxying with mod_remoteip and certain mod_rewrite rules, an attacker could spoof their IP address for logging and PHP scripts. Note this issue was fixed in Apache HTTP Server 2.4.24 but was retrospectively allocated a low severity CVE in 2020.. EPSS estimates a 5.88% chance of exploitation in the next 30 days.

Description

IP address spoofing when proxying using mod_remoteip and mod_rewrite For configurations using proxying with mod_remoteip and certain mod_rewrite rules, an attacker could spoof their IP address for logging and PHP scripts. Note this issue was fixed in Apache HTTP Server 2.4.24 but was retrospectively allocated a low severity CVE in 2020.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

5.88%

92.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apache	Http Server	>= 2.4.1, <= 2.4.23

References

Timeline

Published: Aug 7, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-11985?

How severe is CVE-2020-11985?

CVE-2020-11985 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 5.88% probability of exploitation in the next 30 days.

How do I fix CVE-2020-11985?

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-2020-11985?

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

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Source: NVD / NIST