CVE-2021-32641 Reflected XSS when using flashMessages
Attackers can execute arbitrary code via reflected XSS in Auth0 Lock when flashMessage or languageDictionary features process user input.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-32641?
CVE-2021-32641 is a high-severity cross-site scripting vulnerability in auth0 lock, published on 4 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
auth0-lock is Auth0's signin solution. Versions of nauth0-lock before and including `11.30.0` are vulnerable to reflected XSS. An attacker can execute arbitrary code when the library's `flashMessage` feature is utilized and user input or data from URL parameters is incorporated into the `flashMessage` or the library's `languageDictionary` feature is utilized and user input or data from URL parameters is incorporated into the `languageDictionary`. The vulnerability is patched in version 11.30.1.
Weakness: CWE-79
Which versions are affected by CVE-2021-32641?
2 open source packages ship an affected version, including auth0-lock. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
auth0-lock npm | All versions | 11.30.1 |
auth0-lock npm | All versions | 11.30.1 |
Products include Auth0 Lock.
How do I fix CVE-2021-32641?
Upgrade auth0-lock to 11.30.1 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-2021-32641 being exploited?
There is no known exploitation of CVE-2021-32641 in the wild and no public exploit code.
Other vulnerabilities in auth0 lock
Sources
Also known as GHSA-jr3j-whm4-9wwm.