---
id: CVE-2015-20122
title: >-
  Seeyon A6 collaborative office automation platform contains an unauthenticated
  SQL injection vulnerability in the attach_ids parameter of the file attachment
  download endpoint that allows remote attackers to extract arbitrary database
  co…
summary: >-
  Seeyon A6 collaborative office automation platform contains an unauthenticated
  SQL injection vulnerability in the attach_ids parameter of the file attachment
  download endpoint that allows remote attackers to extract arbitrary database
  co…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-89
vendor: Yonyou
product: A6 OA
affected:
  - a6_oa
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T17:17:00.423'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2015-20122'
references:
  - url: 'https://qkl.seebug.org/vuldb/ssvid-89642'
    label: disclosure@vulncheck.com
  - url: 'https://www.ddpoc.com/poc/DVB-2021-2211.html'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/seeyon-a6-oa-unauthenticated-sql-injection-via-downloadatt-jsp
    label: disclosure@vulncheck.com
  - url: 'https://www.ddpoc.com/poc/DVB-2021-2211.html'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-29T16:06:31.409648Z'
ingestedAt: '2026-09-29T16:39:33.256Z'
---

## Overview

Seeyon A6 collaborative office automation platform contains an unauthenticated SQL injection vulnerability in the attach_ids parameter of the file attachment download endpoint that allows remote attackers to extract arbitrary database contents without prior authentication. Attackers can inject UNION-based SQL statements through the attach_ids request parameter in downloadAtt.jsp to retrieve sensitive information including credentials and system configuration data. Exploitation evidence was first observed by the Shadowserver Foundation on 2023-10-17.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.