CVE-2019-25714
Seeyon Office Anywhere (OA) A8 Unauthenticated Arbitrary File Write via htmlofficeservlet
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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).
| CWE | CWE-434 |
| Vendor | seeyon internet software |
| Product | a8-v5 collaborative management software |
| Published | Apr 21, 2026 |
| Last Updated | Apr 21, 2026 |
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Affected Versions
Seeyon Internet Software / A8-V5 Collaborative Management Software
6.1sp1
Seeyon Internet Software / A8+ Collaborative Management Software
7.0 7.0sp1 7.0sp2 7.0sp3 7.1
References
sourceforge.net: https://sourceforge.net/software/product/A8/ web.archive.org: https://web.archive.org/web/20190821034711/http://wyb0.com/posts/2019/seeyon-htmlofficeservlet-getshell/ wiki.96.mk: https://wiki.96.mk/Web%E5%AE%89%E5%85%A8/%E8%87%B4%E8%BF%9Coa/%E8%87%B4%E8%BF%9C%20OA%20A8%20htmlofficeservlet%20getshell%20%E6%BC%8F%E6%B4%9E/ static-aliyun-doc.oss-cn-hangzhou.aliyuncs.com: https://static-aliyun-doc.oss-cn-hangzhou.aliyuncs.com/download/pdf/90916/Security_Notification_reseller_en-US.pdf broadcom.com: https://www.broadcom.com/support/security-center/attacksignatures/detail?asid=31713 fortiguard.com: https://www.fortiguard.com/encyclopedia/ips/48874/seeyon-office-anywhere-htmlofficeservlet-arbitrary-file-upload vulncheck.com: https://www.vulncheck.com/advisories/seeyon-office-anywhere-oa-a8-unauthenticated-arbitrary-file-write-via-htmlofficeservlet
Credits
🔍 The Shadowserver Foundation