CVE-2024-56364 Cross-site Scripting vulnerability in SimpleXLSXEx::readThemeColors, SimpleXLSXEx::getColorValue and SimpleXLSX::toHTMLEx
Attackers can execute arbitrary JavaScript via the toHTMLEx method in SimpleXLSX, potentially compromising users viewing malicious Excel files.
- 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
- Available
What is CVE-2024-56364?
CVE-2024-56364 is a medium-severity cross-site scripting vulnerability in shuchkin simplexlsx, published on 23 Dec 2024. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
SimpleXLSX is software for parsing and retrieving data from Excel XLSx files. Starting in 1.0.12 and ending in 1.1.13, when calling the extended toHTMLEx method, it is possible to execute arbitrary JavaScript code. This vulnerability is fixed in 1.1.13.
Weakness: CWE-79
Which versions are affected by CVE-2024-56364?
2 open source packages ship an affected version, including shuchkin/simplexlsx.
| Package | Affected | Fixed in |
|---|---|---|
shuchkin/simplexlsx Packagist | From 1.0.12 | 1.1.13 |
shuchkin/simplexlsx Packagist | From 1.0.12 | 1.1.13 |
How do I fix CVE-2024-56364?
Upgrade shuchkin/simplexlsx to 1.1.13 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-2024-56364 being exploited?
There is no known exploitation of CVE-2024-56364 in the wild and no public exploit code.
Sources
Also known as GHSA-r87q-fj25-f8jf.