CVE-2021-42656 Cross site scripting in SiteServer CMS
Cross-site scripting vulnerability in SiteServer CMS allows attackers to inject malicious scripts, potentially leading to session hijacking or code execution.
- 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-2021-42656?
CVE-2021-42656 is a medium-severity cross-site scripting vulnerability in n/a, published on 24 May 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
SiteServer CMS V6.15.51 is affected by a Cross Site Scripting (XSS) vulnerability.
Weakness: CWE-79
Which versions are affected by CVE-2021-42656?
2 open source packages ship an affected version, including SSCMS. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
SSCMS NuGet | All versions to 6.15.51 | None |
SSCMS NuGet | All versions to 6.15.51 | None |
Products include Sscms Siteserver Cms.
How do I fix CVE-2021-42656?
No fix has been published for CVE-2021-42656 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-2021-42656 being exploited?
There is no known exploitation of CVE-2021-42656 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-2xwp-7j3p-c78x.