CVE-2021-22676 Cross-site scripting in WebAccess/SCADA

What is CVE-2021-22676?

CVE-2021-22676 is a medium-severity cross-site scripting vulnerability in WebAccess/SCADA, published on 10 Aug 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

UserExcelOut.asp within WebAccess/SCADA is vulnerable to cross-site scripting (XSS), which could allow an attacker to send malicious JavaScript code. This could result in hijacking of cookie/session tokens, redirection to a malicious webpage, and unintended browser action on the WebAccess/SCADA (WebAccess/SCADA versions prior to 8.4.5, WebAccess/SCADA versions prior to 9.0.1).

Weakness: CWE-79

Which versions are affected by CVE-2021-22676?

It affects 1 product.

Products include Advantech Webaccess\/Scada.

How do I fix CVE-2021-22676?

No fix has been published for CVE-2021-22676 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2021-22676 being exploited?

There is no known exploitation of CVE-2021-22676 in the wild and no public exploit code.

Other vulnerabilities in WebAccess/SCADA

• CVE-2023-1437 CVE-2023-1437 Critical 9.8
• CVE-2021-32943 Memory corruption in WebAccess/SCADA Critical 9.8
• CVE-2019-6519 Auth bypass in n/a Critical 9.8
• CVE-2019-6523 SQL injection in n/a Critical 9.8
• CVE-2021-22669 Privilege escalation in Advantech WebAccess/SCADA High 8.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-xwfh-4h89-6h98.