CVE-2025-9646 O2OA calendarConfig cross site scripting
Remote attackers can inject malicious scripts via the toMonthViewName parameter in O2OA, potentially leading to session hijacking or code execution.
- 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
- None listed
What is CVE-2025-9646?
CVE-2025-9646 is a medium-severity cross-site scripting vulnerability in O2OA, published on 29 Aug 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
A security flaw has been discovered in O2OA up to 10.0-410. This vulnerability affects unknown code of the file /x_organization_assemble_personal/jaxrs/definition/calendarConfig. The manipulation of the argument toMonthViewName results in cross site scripting. The attack can be launched remotely. The exploit has been released to the public and may be exploited. The vendor replied in the GitHub issue (translated from simplified Chinese): "This issue will be fixed in the new version."
Which versions are affected by CVE-2025-9646?
It affects 1 product.
Products include Zoneland O2oa.
How do I fix CVE-2025-9646?
No fix has been published for CVE-2025-9646 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-2025-9646 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9646 exists.
Other vulnerabilities in O2OA
Sources
Also known as GHSA-hj93-8xvj-w9rj.