CVE-2021-32855 vditor vulnerable to Cross-site Scripting
An attacker can execute arbitrary scripts in a victim's browser by tricking them into pasting malicious content into the Vditor Markdown editor.
- 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
- Available
What is CVE-2021-32855?
CVE-2021-32855 is a medium-severity cross-site scripting vulnerability in npm vditor, published on 20 Feb 2023. 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
Vditor is a browser-side Markdown editor. Versions prior to 3.8.7 are vulnerable to copy-paste cross-site scripting (XSS). For this particular type of XSS, the victim needs to be fooled into copying a malicious payload into the text editor. Version 3.8.7 contains a patch for this issue.
Weakness: CWE-79
Which versions are affected by CVE-2021-32855?
2 open source packages ship an affected version, including vditor. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
vditor npm | All versions | 3.8.7 |
vditor npm | All versions | 3.8.7 |
Products include B3log Vditor.
How do I fix CVE-2021-32855?
Upgrade vditor to 3.8.7 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-2021-32855 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-32855 exists.
Other vulnerabilities in npm vditor
- CVE-2021-4103 Cross-site Scripting (XSS) - Stored in vanessa219/vditor
- CVE-2022-0341 Cross-site Scripting (XSS) - Stored in vanessa219/vditor
- CVE-2024-34449 Vditor allows Cross-site Scripting via an attribute of an `A` element
- CVE-2022-0350 Cross-site Scripting (XSS) - Stored in vanessa219/vditor
- CVE-2024-39150 Path traversal in n/a
Sources
Also known as GHSA-vfmp-9999-6wqj.