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CVE-2021-32745 Reflected Cross-Site-Scripting vulnerability

High 7.3 Published Updated

Attackers can inject scripts into Collabora Online iframes to steal user settings and session authentication tokens.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
Not needed
Fix
None listed

What is CVE-2021-32745?

CVE-2021-32745 is a high-severity cross-site scripting vulnerability in CollaboraOnline online, published on 21 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Collabora Online is a collaborative online office suite. A reflected XSS vulnerability was found in Collabora Online prior to version 6.4.9-5. An attacker could inject unescaped HTML into a variable as they created the Collabora Online iframe, and execute scripts inside the context of the Collabora Online iframe. This would give access to a small set of user settings stored in the browser, as well as the session's authentication token which was also passed in at iframe creation time. The issue is patched in Collabora Online 6.4.9-5. Collabora Online 4.2 is not affected.

Weakness: CWE-79

Which versions are affected by CVE-2021-32745?

It affects 1 product.

Products include Collabora Online.

How do I fix CVE-2021-32745?

No fix has been published for CVE-2021-32745 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-2021-32745 being exploited?

There is no known exploitation of CVE-2021-32745 in the wild and no public exploit code.

Sources

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