CVE-2018-19057 SimpleMDE XSS Vulnerability
An attacker can execute arbitrary scripts in the victim's browser by crafting malicious Markdown input in the SimpleMDE editor.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2018-19057?
CVE-2018-19057 is a medium-severity cross-site scripting vulnerability in n/a, published on 7 Nov 2018. 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
SimpleMDE 1.11.2 has XSS via an onerror attribute of a crafted IMG element, or via certain input with [ and ( characters, which is mishandled during construction of an A element.
Weakness: CWE-79
Which versions are affected by CVE-2018-19057?
2 open source packages ship an affected version, including simplemde. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
simplemde npm | All versions to 1.11.2 | None |
simplemde npm | All versions to 1.11.2 | None |
Products include Sparksuite Simplemde.
How do I fix CVE-2018-19057?
No fix has been published for CVE-2018-19057 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-2018-19057 being exploited?
There is no known exploitation of CVE-2018-19057 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-wg85-p6j7-gp3w.