Security readout for executives and security teams
Plain-English summary
This flaw lets an unauthenticated remote attacker write files into Seeyon OA’s web application. In practical terms, a vulnerable internet-facing OA server could be turned into a remote command execution foothold. The issue is critical because it needs no login or user interaction and affects collaboration software likely to contain sensitive business data.
Executive priority
Treat as an urgent remediation item for any internet-facing Seeyon OA deployment. The business risk is server takeover and potential access to sensitive collaboration data. Prioritize exposure reduction, vendor guidance review, and compromise assessment before routine patch cycles.
Technical view
CVE-2019-25714 is an unauthenticated arbitrary file write in Seeyon OA A8 /seeyon/htmlofficeservlet. Sources describe crafted POST requests causing writes to the web root, including JSP webshell placement, leading to OS command execution as the web server user. CVSS 4.0 is 9.3, with network access, low complexity, and no privileges required.
Likely exposure
Likely exposed assets are Seeyon A8-V5 6.1sp1 and A8+ 7.0 through 7.1 where /seeyon/htmlofficeservlet is reachable, especially internet-facing deployments. The bundle lists affected versions but has unknown default status and no CPEs, so inventory validation is required.
Exploitation context
Public exploit writeups are cited in the source bundle. The CVE description states Shadowserver first observed exploitation evidence on 2021-03-26 UTC. The bundle marks CISA KEV as false, so do not treat it as KEV-listed without separate confirmation.
Researcher notes
Evidence is strong for vulnerability impact and historical exploitation, but the bundle does not name a specific vendor patch version. Public references include exploit-oriented material; use them defensively for detection and validation only. Affected-version scoping is limited to the listed versions and default status remains unknown.
Mitigation direction
- Check Seeyon and Aliyun advisory guidance for supported fixes or configuration mitigations.
- Remove direct internet exposure for affected OA systems where possible.
- Restrict /seeyon/htmlofficeservlet access to trusted networks until remediated.
- Enable or update IPS/WAF controls using Broadcom and Fortinet coverage where applicable.
- Review systems for compromise before returning them to service.
Validation and detection
- Inventory Seeyon OA A8-V5 and A8+ deployments and confirm exact versions.
- Determine whether /seeyon/htmlofficeservlet is reachable from untrusted networks.
- Review web logs for suspicious POST activity to the affected endpoint.
- Inspect web application directories for unexpected JSP or newly written files.
- Verify security controls detect the referenced Seeyon htmlofficeservlet activity.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-434: File access and web shell behavior lookup
File traversal and upload weaknesses can lead teams to review file, web shell, execution, and collection telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-25714 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.3 (4.0)
- Known Exploited
- No
- Published
Vector: 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
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
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——Primary CVE scoreVulnerability scoring details
Base CVSS 4.0 score
9.3CriticalVector: 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
Source materials
- CVE List V5 sourceCVE List V5
- https://sourceforge.net/software/product/A8/CVE reference · product
- https://web.archive.org/web/20190821034711/http://wyb0.com/posts/2019/seeyon-htmlofficeservlet-getshell/CVE reference · exploit
- 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/CVE reference · exploit
- https://static-aliyun-doc.oss-cn-hangzhou.aliyuncs.com/download/pdf/90916/Security_Notification_reseller_en-US.pdfCVE reference · third-party-advisory, mitigation
- https://www.broadcom.com/support/security-center/attacksignatures/detail?asid=31713CVE reference · third-party-advisory
- https://www.fortiguard.com/encyclopedia/ips/48874/seeyon-office-anywhere-htmlofficeservlet-arbitrary-file-uploadCVE reference · third-party-advisory
- https://www.vulncheck.com/advisories/seeyon-office-anywhere-oa-a8-unauthenticated-arbitrary-file-write-via-htmlofficeservletCVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Unrestricted Upload of File with Dangerous Type
Unrestricted Upload of File with Dangerous Type represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.