CVE-2020-27735 Cross-site scripting in n/a
An attacker can inject arbitrary HTML and JavaScript into Wing FTP help pages via crafted links, executing code in the user's browser.
- 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-2020-27735?
CVE-2020-27735 is a medium-severity cross-site scripting vulnerability in n/a, published on 20 Jan 2021. 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
An XSS issue was discovered in Wing FTP 6.4.4. An arbitrary IFRAME element can be included in the help pages via a crafted link, leading to the execution of (sandboxed) arbitrary HTML and JavaScript in the user's browser.
Weakness: CWE-79
Which versions are affected by CVE-2020-27735?
It affects 1 product.
Products include Wftpserver Wing Ftp Server.
How do I fix CVE-2020-27735?
No fix has been published for CVE-2020-27735 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-2020-27735 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-27735 exists.
Public exploit code: 1 Nuclei template.
Other vulnerabilities in n/a
- CVE-2025-47812 Wing FTP Server Improper Neutralization of Null Byte or NUL Character
- CVE-2025-47813 Wing FTP Server Information Disclosure
- CVE-2026-44403 Wing FTP Server < 8.1.3 Authenticated Remote Code Execution via Session Serialization
- CVE-2020-37032 Wing FTP Server 6.3.8 - Remote Code Execution
- CVE-2019-25267 Wing FTP Server 6.0.7 - Unquoted Service Path
Sources
Also known as GHSA-v47h-2vrq-3gqp.