CVE-2021-33040 Cross-site Scripting in epubjs
Cross-site scripting vulnerability in EPub.js allows attackers to inject malicious scripts via iframe.js, potentially compromising user sessions.
- 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-2021-33040?
CVE-2021-33040 is a medium-severity cross-site scripting vulnerability in n/a, published on 17 Jan 2022. 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
managers/views/iframe.js in FuturePress EPub.js before 0.3.89 allows XSS.
Weakness: CWE-79
Which versions are affected by CVE-2021-33040?
2 open source packages ship an affected version, including epubjs. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
epubjs npm | All versions | 0.3.89 |
epubjs npm | All versions | 0.3.89 |
Products include Futurepress Epub.js.
How do I fix CVE-2021-33040?
Upgrade epubjs to 0.3.89 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-2021-33040 being exploited?
There is no known exploitation of CVE-2021-33040 in the wild and no public exploit code.
Sources
Also known as GHSA-c6rp-xvqv-mwmf.