CVE-2025-66420 Tryton sao allows XSS via an HTML attachment
An attacker can execute arbitrary scripts in the Tryton web client via malicious HTML attachments, potentially compromising user sessions.
- 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-2025-66420?
CVE-2025-66420 is a medium-severity cross-site scripting vulnerability in Tryton sao, published on 30 Nov 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Tryton sao (aka tryton-sao) before 7.6.9 allows XSS via an HTML attachment. This is fixed in 7.6.9, 7.4.19, 7.0.38, and 6.0.67.
Weakness: CWE-79
Which versions are affected by CVE-2025-66420?
8 open source packages ship an affected version, including tryton-sao.
| Package | Affected | Fixed in |
|---|---|---|
tryton-sao npm | All versions | 6.0.67 |
tryton-sao npm | All versions | 6.0.67 |
tryton-sao npm | From 7.0.0 | 7.0.38 |
tryton-sao npm | From 7.0.0 | 7.0.38 |
tryton-sao npm | From 7.1.0 | 7.4.19 |
tryton-sao npm | From 7.1.0 | 7.4.19 |
2 more packages
tryton-sao npm | From 7.5.0 | 7.6.9 |
tryton-sao npm | From 7.5.0 | 7.6.9 |
How do I fix CVE-2025-66420?
Upgrade tryton-sao to a fixed version for your release line: 6.0.67, 7.0.38, 7.4.19 or 7.6.9.
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-2025-66420 being exploited?
There is no known exploitation of CVE-2025-66420 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-66420, DSA-6034-1, GHSA-xhgv-99mj-8m2x, UBUNTU-CVE-2025-66420.