CVE-2019-25714 Seeyon Office Anywhere (OA) A8 Unauthenticated Arbitrary File Write via htmlofficeservlet
Remote attackers can write arbitrary files, including JSP webshells, to the web root via an unauthenticated endpoint, leading to arbitrary code execution.
- 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-2019-25714?
CVE-2019-25714 is a critical vulnerability in Seeyon Internet Software A8+ Collaborative Management Software, published on 21 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Seeyon OA A8 contains an unauthenticated arbitrary file write vulnerability in the /seeyon/htmlofficeservlet endpoint that allows remote attackers to write arbitrary files to the web application root by sending specially crafted POST requests with custom base64-encoded payloads. Attackers can write JSP webshells to the web root and execute them through the web server to achieve arbitrary OS command execution with web server privileges. Exploitation evidence was first observed by the Shadowserver Foundation on 2021-03-26 (UTC).
Weakness: CWE-434
Which versions are affected by CVE-2019-25714?
How do I fix CVE-2019-25714?
No fix has been published for CVE-2019-25714 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-25714 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25714 exists.
Sources
Also known as GHSA-8p56-4vpw-2jvc.