Stirling-Tools Stirling-PDF 2.7.3 PDF File Parser /api/v1/convert/eml/pdf cross site scripting

Summaryinfo

A vulnerability described as problematic has been identified in Stirling-Tools Stirling-PDF 2.7.3. Impacted is an unknown function of the file /api/v1/convert/eml/pdf of the component PDF File Parser. Such manipulation leads to cross site scripting. This vulnerability is documented as CVE-2026-34071. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Stirling-Tools Stirling-PDF 2.7.3. Affected by this issue is an unknown code block of the file /api/v1/convert/eml/pdf of the component PDF File Parser. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

Stirling-PDF is a locally hosted web application that allows you to perform various operations on PDF files. In version 2.7.3, the /api/v1/convert/eml/pdf endpoint with parameter downloadHtml=true returns unsanitized HTML from the email body with Content-Type: text/html. An attacker who sends a malicious email to a Stirling-PDF user can achieve JavaScript execution when that user exports the email using the "Download HTML intermediate file" feature. Version 2.8.0 fixes the issue.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-34071 since 03/25/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-16271). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• Stirling-Tools

Name

• Stirling-PDF

Version

• 2.7.3

Website

• Product: https://github.com/Stirling-Tools/Stirling-PDF/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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