CVE-2021-4097 CRLF Injection in phpservermon/phpservermon

What is CVE-2021-4097?

CVE-2021-4097 is a medium-severity vulnerability in phpservermon/phpservermon, published on 11 Dec 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

phpservermon is vulnerable to Improper Neutralization of CRLF Sequences

Weakness: CWE-93

Which versions are affected by CVE-2021-4097?

2 open source packages ship an affected version, including phpservermon/phpservermon. It affects 1 product.

Products include Phpservermonitor Php Server Monitor.

How do I fix CVE-2021-4097?

No fix has been published for CVE-2021-4097 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-4097 being exploited?

There is no known exploitation of CVE-2021-4097 in the wild and no public exploit code.

Other vulnerabilities in phpservermon/phpservermon

• CVE-2018-18921 CSRF in PHP Server Monitor before 3.3.2 Medium 6.5
• CVE-2021-4240 phpservermon User.php generatePasswordResetToken predictable algorithm in random number generator Low 2.6
• CVE-2021-4241 phpservermon User.php setUserLoggedIn predictable algorithm in random number generator Low 2.6

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-8qv8-fq5w-p966.