CVE-2026-25764Network attack vector

Stored HTML injection via unescaped work package names

Published Feb 6, 2026 · Updated Feb 6, 2026

Stored HTML injection in OpenProject before 16.6.7 and 17.0.0 through 17.0.2 allows remote authenticated users to alter browser content. The time-tracking view renders HTML tags from a selected work package name without escaping them when it populates the Work packages section. Administrator privileges are required to create the crafted work package, and exploitation also requires a user to load the affected time-tracking view.

CVSS severity3.5
Low
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored HTML injection in OpenProject before 16.6.7 and 17.0.0 through 17.0.2 allows remote authenticated users to alter browser content. The time-tracking view renders HTML tags from a selected work package name without escaping them when it populates the Work packages section. Administrator privileges are required to create the crafted work package, and exploitation also requires a user to load the affected time-tracking view.

The record

CVE
CVE-2026-25764
Published
Feb 6, 2026
Updated
Feb 6, 2026
Vendor
OpenProject GmbH
Product
OpenProject
Classifications
CWE-80, CAPEC-18, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 16.6.7
  2. Affected versionversion=< 17.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

OpenProject GmbH · OpenProjectversion=< 16.6.7; version=< 17.0.3

Published CVSS scores

3.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CAPEC-18XSS Targeting Non-Script Elements
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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