CVE-2019-25714Known exploitationPublic exploitNetwork attack vector

Unauthenticated code execution via arbitrary file write

Published Apr 21, 2026 · Updated Apr 21, 2026

Unrestricted file upload in Seeyon A8-V5 and A8+ allows remote attackers to execute OS commands via unauthenticated HTTP requests. The /seeyon/htmlofficeservlet handler decodes attacker-controlled base64 content and writes it into the web application root without restricting dangerous file types. No credentials or user interaction are required; placing a JSP webshell in the served root grants command execution with web server privileges.

CVSS severity9.3
Critical
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Seeyon A8-V5 and A8+ allows remote attackers to execute OS commands via unauthenticated HTTP requests. The /seeyon/htmlofficeservlet handler decodes attacker-controlled base64 content and writes it into the web application root without restricting dangerous file types. No credentials or user interaction are required; placing a JSP webshell in the served root grants command execution with web server privileges.

The record

CVE
CVE-2019-25714
Published
Apr 21, 2026
Updated
Apr 21, 2026
Vendor
Beijing Seeyon Internet Software Corp.
Product
A8-V5 Collaborative Management Software
Classifications
CWE-434, T1190, T1505.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 26, 2021Exploitation reportedShadowserver observed exploitation
  2. Apr 21, 2026CVE publishedPublication date reported by the CVE source.
  3. Apr 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.1sp1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Beijing Seeyon Internet Software Corp. · A8-V5 Collaborative Management Softwareversion=6.1sp1
Beijing Seeyon Internet Software Corp. · A8+ Collaborative Management Softwareversion=7.0; version=7.0sp1; version=7.0sp2; version=7.0sp3; version=7.1

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application
T1505.003Server Software Component: Web Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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