CVE-2017-9071 MODX Revolution XSS via HTTP Host header

What is CVE-2017-9071?

CVE-2017-9071 is a medium-severity cross-site scripting vulnerability in n/a, published on 18 May 2017. 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

In MODX Revolution before 2.5.7, an attacker might be able to trigger XSS by injecting a payload into the HTTP Host header of a request. This is exploitable only in conjunction with other issues such as Cache Poisoning.

Weakness: CWE-79

Which versions are affected by CVE-2017-9071?

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

Products include Modx Modx Revolution.

How do I fix CVE-2017-9071?

Upgrade modx/revolution to 2.5.7 or later.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2017-9071 being exploited?

There is no known exploitation of CVE-2017-9071 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2017-7321 Code injection in n/a Critical 9.8
• CVE-2017-7324 Code injection in n/a Critical 9.8
• CVE-2020-25911 XML External Entity vulnerability in MODX CMS Critical 9.1
• CVE-2017-9069 MODX Revolution allows overwriting .htaccess High 8.8
• CVE-2017-7322 Weak cryptography in n/a High 8.1

Sources

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

Also known as GHSA-p2j4-vrgx-96qg.