CVE-2021-36440 Unrestricted File Upload in ShowDoc v2.9.5
Remote attackers can execute arbitrary code by uploading malicious files via the file_url parameter in ShowDoc.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-36440?
CVE-2021-36440 is a critical vulnerability in n/a, published on 8 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Unrestricted File Upload in ShowDoc v2.9.5 allows remote attackers to execute arbitrary code via the 'file_url' parameter in the component AdminUpdateController.class.php'.
Weakness: CWE-434
Which versions are affected by CVE-2021-36440?
2 open source packages ship an affected version, including showdoc/showdoc. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
showdoc/showdoc Packagist | All versions | 2.9.6 |
showdoc/showdoc Packagist | All versions | 2.9.6 |
Products include Showdoc Showdoc.
How do I fix CVE-2021-36440?
Upgrade showdoc/showdoc to 2.9.6 or later.
Is CVE-2021-36440 being exploited?
There is no known exploitation of CVE-2021-36440 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2021-41745 Showdoc File Upload Vulnerability
- CVE-2022-0942 Stored XSS due to Unrestricted File Upload in star7th/showdoc
- CVE-2022-1034 There is a Unrestricted Upload of File vulnerability in ShowDoc v2.10.3 in star7th/showdoc
- CVE-2022-0945 Stored XSS viva axd and cshtml file upload in star7th/showdoc in star7th/showdoc
- CVE-2022-0965 Stored XSS viva .ofd file upload in star7th/showdoc
Sources
Also known as GHSA-c442-3278-rhrg.