Vulnerability-Lookup

GHSA-8P56-4VPW-2JVC

Vulnerability from github – Published: 2026-04-21 18:31 – Updated: 2026-04-21 18:31

Details

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).

Severity

9.3 (Critical)


                  
                    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

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{
  "affected": [],
  "aliases": [
    "CVE-2019-25714"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-434"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-21T17:16:20Z",
    "severity": "CRITICAL"
  },
  "details": "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.\u00a0Exploitation evidence was first observed by the Shadowserver Foundation on 2021-03-26 (UTC).",
  "id": "GHSA-8p56-4vpw-2jvc",
  "modified": "2026-04-21T18:31:57Z",
  "published": "2026-04-21T18:31:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-25714"
    },
    {
      "type": "WEB",
      "url": "https://sourceforge.net/software/product/A8"
    },
    {
      "type": "WEB",
      "url": "https://static-aliyun-doc.oss-cn-hangzhou.aliyuncs.com/download/pdf/90916/Security_Notification_reseller_en-US.pdf"
    },
    {
      "type": "WEB",
      "url": "https://web.archive.org/web/20190821034711/http://wyb0.com/posts/2019/seeyon-htmlofficeservlet-getshell"
    },
    {
      "type": "WEB",
      "url": "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"
    },
    {
      "type": "WEB",
      "url": "https://www.broadcom.com/support/security-center/attacksignatures/detail?asid=31713"
    },
    {
      "type": "WEB",
      "url": "https://www.fortiguard.com/encyclopedia/ips/48874/seeyon-office-anywhere-htmlofficeservlet-arbitrary-file-upload"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/seeyon-office-anywhere-oa-a8-unauthenticated-arbitrary-file-write-via-htmlofficeservlet"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2019-25714 (GCVE-0-2019-25714)

Vulnerability from cvelistv5 – Published: 2026-04-21 16:11 – Updated: 2026-07-28 01:47 X_Known Exploited Vulnerability

Title

Seeyon Office Anywhere (OA) A8 Unauthenticated Arbitrary File Write via htmlofficeservlet

Summary

Severity

9.3 (Critical)


                        
                          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

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-21 20:31 UTC

CWE

CWE-434 - Unrestricted Upload of File with Dangerous Type

Assigner

VulnCheck mitre root

References

7 references

URL	Tags
https://sourceforge.net/software/product/A8/	product
https://web.archive.org/web/20190821034711/http:/…	exploit
https://wiki.96.mk/Web%E5%AE%89%E5%85%A8/%E8%87%B…	exploit
https://static-aliyun-doc.oss-cn-hangzhou.aliyunc…	third-party-advisorymitigation
https://www.broadcom.com/support/security-center/…	third-party-advisory
https://www.fortiguard.com/encyclopedia/ips/48874…	third-party-advisory
https://www.vulncheck.com/advisories/seeyon-offic…	third-party-advisory

Impacted products

2 products

Vendor	Product	Version
Seeyon Internet Software	A8-V5 Collaborative Management Software	Affected: 6.1sp1
Seeyon Internet Software	A8+ Collaborative Management Software	Affected: 7.0 Affected: 7.0sp1 Affected: 7.0sp2 Affected: 7.0sp3 Affected: 7.1

Credits

The Shadowserver Foundation

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.