CVE-2020-18657 Cross-site scripting in n/a

What is CVE-2020-18657?

CVE-2020-18657 is a medium-severity cross-site scripting vulnerability in n/a, published on 23 Jun 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

Cross Site Scripting (XSS) vulnerability in GetSimpleCMS <= 3.3.15 in admin/changedata.php via the redirect_url parameter and the headers_sent function.

Weakness: CWE-79

Which versions are affected by CVE-2020-18657?

It affects 1 product.

Products include Get-Simple Getsimplecms.

How do I fix CVE-2020-18657?

No fix has been published for CVE-2020-18657 yet. Limit exposure of the affected software until one is available.

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-2020-18657 being exploited?

There is no known exploitation of CVE-2020-18657 in the wild and no public exploit code.

Other vulnerabilities in n/a

• CVE-2023-46042 Code injection in n/a Critical 9.8
• CVE-2020-18191 Path traversal in n/a Critical 9.1
• CVE-2013-10032 GetSimple CMS 3.2.1 Authenticated RCE via Arbitrary PHP File Upload High 8.7
• CVE-2021-47778 GetSimple CMS My SMTP Contact Plugin 1.1.2 - PHP Code Injection High 8.6
• CVE-2021-47860 GetSimple CMS Custom JS 0.1 - CSRF to XSS to RCE High 8.5

Sources

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

Also known as GHSA-3gp2-fxr9-ph7v.