CVE-2017-5553 Cross-site scripting in n/a

Medium 5.4 Published 23 Jan 2017 Updated 5 Aug 2024

Authenticated users can inject arbitrary scripts via javascript URLs in the markdown plugin, potentially compromising other users.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2017-5553?

CVE-2017-5553 is a medium-severity cross-site scripting vulnerability in n/a, published on 23 Jan 2017. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Cross-site scripting (XSS) vulnerability in plugins/markdown_plugin/_markdown.plugin.php in b2evolution before 6.8.5 allows remote authenticated users to inject arbitrary web script or HTML via a javascript: URL.

Weakness: CWE-79

Which versions are affected by CVE-2017-5553?

It affects 1 product.

Products include B2evolution B2evolution.

How do I fix CVE-2017-5553?

No fix has been published for CVE-2017-5553 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-2017-5553 being exploited?

There is no known exploitation of CVE-2017-5553 in the wild and no public exploit code.

Sources

Also known as GHSA-3qgg-x8gm-v5qm.