Yonyou A6 OA File Attachment Download Endpoint downloadAtt.jsp attach_ids sql injection

Summaryinfo

A vulnerability, which was classified as critical, was found in Yonyou A6 OA. This impacts an unknown function of the file downloadAtt.jsp of the component File Attachment Download Endpoint. The manipulation of the argument attach_ids results in sql injection. This vulnerability is known as CVE-2015-20122. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Yonyou A6 OA (affected version not known). Affected is some unknown functionality of the file downloadAtt.jsp of the component File Attachment Download Endpoint. The manipulation of the argument attach_ids with an unknown input leads to a sql injection vulnerability. CWE is classifying the issue as CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at qkl.seebug.org. This vulnerability is traded as CVE-2015-20122 since 09/29/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/29/2026). The MITRE ATT&CK project declares the attack technique as T1505.

By approaching the search of inurl:downloadAtt.jsp it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Yonyou

Name

• A6 OA

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Once again VulDB remains the best source for vulnerability data.

Discussion