CWE-79 Medium severity

Stored XSS in Google Sites

Stored XSS vulnerability in Google Sites via data/base64 encoded iframes that bypassed JavaScript execution restrictions.

Original release date
February 2016
Discovered by
Fabián Cuchietti
Severity
6.1 / 10 CVSS v3.0
Affected product
Google Sites (sites.google.com)

Antecedentes

Google Sites is a structured wiki and web page creation tool offered by Google as part of the Google Apps for Work productivity suite.

Description

The vulnerability allows for bypassing JavaScript execution restrictions via embedded iframes using data and base64 encoding. Persistent XSS occurs when attacker-supplied data is stored by the server and permanently displayed on standard pages returned to other users.

Business impact

An attacker can execute arbitrary HTML or script code in the target user's browser to steal credentials and personal data.

Sistemas afectados

sites.google.com

Solución

The vulnerability was fixed by Google.

Calendario de divulgación

Dec 13, 2015 Vulnerability acquired by Internet Security Auditors.
Dec 13, 2015 Contact with Google Security Team.
Dec 14, 2015 Vendor response received.
Feb 16, 2016 Advisory publication.

References

Acerca de Internet Security Auditors

Company based in Spain and Colombia, specializing in web application auditing, network security, penetration testing, and implementation and assessment of compliance. Our clients include some of the largest finance, telecommunications, insurance, and ICT companies. Vendor-independent provider with deep experience since 2001. Our R&D efforts include vulnerability research, collaboration on open security projects, whitepapers, and participation in industry events.

Would you like us to review your product?

Contact us
Contact

Do you need a security audit?

Tell us about your situation and our team will get in touch with you to provide guidance or schedule a technical call.

Request information

We will contact you as soon as possible.
Global Presence

Our offices

Barcelona

C. Santander, 101. Building A-2
E-08030 Barcelona (Spain)

+34 93 305 13 18
Madrid

Arequipa St., 1
28043 Madrid (Spain)

+34 91 763 40 47
Bogotá

Transversal 22 # 98-82, Porta 100 Building, Office 1003
110221 Bogotá (Colombia)

+57 601 638 68 88
25
years of experience in cybersecurity
Contact us