CVE-2021-4172 Cross-site Scripting (XSS) - Stored in star7th/showdoc
Attackers can inject malicious scripts into ShowDoc, potentially stealing user sessions or executing code in victim browsers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-4172?
CVE-2021-4172 is a medium-severity cross-site scripting vulnerability in star7th/showdoc, published on 22 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Cross-site Scripting (XSS) - Stored in GitHub repository star7th/showdoc prior to 2.10.2.
Weakness: CWE-79
Which versions are affected by CVE-2021-4172?
2 open source packages ship an affected version, including showdoc/showdoc. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
showdoc/showdoc Packagist | All versions | 2.10.2 |
showdoc/showdoc Packagist | All versions | 2.10.2 |
Products include Showdoc Showdoc.
How do I fix CVE-2021-4172?
Upgrade showdoc/showdoc to 2.10.2 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-2021-4172 being exploited?
There is no known exploitation of CVE-2021-4172 in the wild and no public exploit code.
Other vulnerabilities in star7th/showdoc
- CVE-2021-41745 Showdoc File Upload Vulnerability
- CVE-2021-36440 Unrestricted File Upload in ShowDoc v2.9.5
- 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
Sources
Also known as GHSA-7x22-pmw5-66mq.