Seeyon Office Anywhere (OA) A8 Unauthenticated Arbitrary File Write via htmlofficeservlet
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-434.
Summary
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).
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Seeyon Internet Software | A8-V5 Collaborative Management Software | 6.1sp1 | — | No fix listed | CNA |
| Seeyon Internet Software | A8+ Collaborative Management Software | 7.0; 7.0sp1; 7.0sp2; 7.0sp3; 7.1 | — | No fix listed | CNA |
- A8-V5 Collaborative Management Software VendorSeeyon Internet Software Affected 6.1sp1 Fixed in — No fix listed CNA
- A8+ Collaborative Management Software VendorSeeyon Internet Software Affected 7.0; 7.0sp1; 7.0sp2; 7.0sp3; 7.1 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-25714
- 2026-10-03 Alias added: GHSA-8p56-4vpw-2jvc
- 2026-10-14 EPSS moved to the 50th–90th percentile
References
Exploit 2
Advisory 3
- https://static-aliyun-doc.oss-cn-hangzhou.aliyuncs.com/download/pdf/90916/Security_Notification_reseller_en-US.pdf
- https://www.broadcom.com/support/security-center/attacksignatures/detail?asid=31713
- https://www.fortiguard.com/encyclopedia/ips/48874/seeyon-office-anywhere-htmlofficeservlet-arbitrary-file-upload
Sources
- CVE-2019-25714 · CVE Program
- CVE-2019-25714 · NVD
- FIRST EPSS
- GHSA-8p56-4vpw-2jvc · GitHub Advisory Database · CC BY 4.0
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