CVE-2021-26925 Cross-site scripting in n/a
Attackers can execute arbitrary scripts in victim browsers via crafted CSS in HTML emails, potentially leading to session hijacking or data theft.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-26925?
CVE-2021-26925 is a medium-severity cross-site scripting vulnerability in Fedoraproject Fedora, published on 9 Feb 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Roundcube before 1.4.11 allows XSS via crafted Cascading Style Sheets (CSS) token sequences during HTML email rendering.
Weakness: CWE-79
Which versions are affected by CVE-2021-26925?
1 open source package ship an affected version, including roundcube. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
roundcube Bitnami | All versions | 1.4.11 |
Products include Fedoraproject Fedora, Roundcube Webmail.
How do I fix CVE-2021-26925?
Upgrade roundcube to 1.4.11 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-2021-26925 being exploited?
There is no known exploitation of CVE-2021-26925 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as BIT-roundcube-2021-26925, DEBIAN-CVE-2021-26925, GHSA-xw9h-8vfr-ppf5, MGASA-2021-0130, UBUNTU-CVE-2021-26925.