opf openproject up to 16.6.6/17.0.2 time cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in opf openproject up to 16.6.6/17.0.2. Affected by this issue is some unknown functionality of the component time Handler. Performing a manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2026-25764. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in opf openproject up to 16.6.6/17.0.2. This affects some unknown functionality of the component time Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. This is going to have an impact on integrity. The summary by CVE is:

OpenProject is an open-source, web-based project management software. Prior to versions 16.6.7 and 17.0.3, an HTML injection vulnerability occurs in the time tracking function of OpenProject. The application does not escape HTML tags, an attacker with administrator privileges can create a work package with the name containing the HTML tags and add it to the Work package section when creating time tracking. This issue has been patched in versions 16.6.7 and 17.0.3.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-25764 since 02/05/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Additional levels of successful authentication are needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 16.6.7 or 17.0.3 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-5557). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Project Management Software

Vendor

• opf

Name

• openproject

Version

• 16.6.0
• 16.6.1
• 16.6.2
• 16.6.3
• 16.6.4
• 16.6.5
• 16.6.6
• 17.0.0
• 17.0.1
• 17.0.2

Website

• Product: https://github.com/opf/openproject/

CPE 2.3info

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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