CVE-2026-81635
Deferred Deferred - Pending Action

Cross-Site Scripting in SHIRASAGI

Publication date: 2026-09-10

Last updated on: 2026-09-10

Assigner: JPCERT/CC

Description
A cross-site scripting vulnerability exists in SHIRASAGI, which may allow an attacker to execute an arbitrary script in the web browser of a user who accesses a website using the affected product.

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Meta Information

Published
2026-09-10
Last Modified
2026-09-10
Generated
2026-09-30
AI Q&A
2026-09-10
EPSS Evaluated
2026-09-29
NVD
CVE-2026-81635
EUVD
EUVD-2026-75271

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
shirasagi shirasagi *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
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.

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Executive Summary

This is a cross-site scripting (XSS) vulnerability in SHIRASAGI. It allows an attacker to inject malicious scripts into web pages viewed by users. The vulnerability exists in versions v1.14.0 to v1.20.2 and can be exploited through the management screen's purpose-specific guide feature.

Detection Guidance

To detect this XSS vulnerability in SHIRASAGI, check if your system is running versions v1.14.0 to v1.20.2. Inspect web application logs for unusual script execution or input validation failures. No specific commands are provided in the resources.

Impact Analysis

An attacker could execute arbitrary scripts in your browser when you access a vulnerable SHIRASAGI website. This may lead to theft of session cookies, account hijacking, or unauthorized actions on your behalf. The impact depends on user privileges and the sensitivity of data accessed.

Compliance Impact

XSS vulnerabilities can lead to unauthorized data access or modification, violating GDPR's integrity and confidentiality principles. For HIPAA, it may compromise protected health information integrity. Organizations must address this to maintain compliance.

Mitigation Strategies

Immediately update SHIRASAGI to version v1.21.0 or later. If updating is not possible, apply the provided commits to patch the vulnerability. Remove or restrict access to the affected guide functionality in the admin panel.

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