# 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.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Apr 2026
- **Updated:** 28 Jul 2026
- **Also known as:** GHSA-8p56-4vpw-2jvc

## 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 (Unrestricted Upload of File with Dangerous Type)

## 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.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-25714 and fix it if it is affected.

What it is: 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25714 exists.

Affected product: Seeyon Internet Software A8+ Collaborative Management Software. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2019-25714/ (Markdown: https://insights.sbomify.com/CVE-2019-25714/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-25714
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-25714
- OSV: https://osv.dev/vulnerability/CVE-2019-25714

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-25714/
Summaries are generated and may contain mistakes; the official description above is the record.