CVE-2018-18840 Cross-site scripting in n/a

Medium 5.4 Published 30 Oct 2018 Updated 5 Aug 2024

Cross-site scripting vulnerability in SEMCMS PHP allows attackers to inject malicious scripts via the tag_indexmetatit parameter.

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-2018-18840?

CVE-2018-18840 is a medium-severity cross-site scripting vulnerability in Sem-Cms Semcms, published on 30 Oct 2018. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

XSS was discovered in SEMCMS PHP V3.4 via the SEMCMS_SeoAndTag.php?Class=edit&CF=SeoAndTag tag_indexmetatit parameter.

Weakness: CWE-79

Which versions are affected by CVE-2018-18840?

It affects 1 product.

Products include Sem-Cms Semcms.

How do I fix CVE-2018-18840?

No fix has been published for CVE-2018-18840 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-2018-18840 being exploited?

There is no known exploitation of CVE-2018-18840 in the wild and no public exploit code.

All Sem-Cms Semcms vulnerabilities

Sources

Also known as GHSA-c8vg-m892-7pcg.