CVE-2021-34540 Cross-site scripting in n/a
An attacker can inject malicious scripts into the username field of the WADashboard page, potentially compromising user sessions or executing code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-34540?
CVE-2021-34540 is a medium-severity cross-site scripting vulnerability in Advantech Webaccess, published on 11 Jun 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
Advantech WebAccess 8.4.2 and 8.4.4 allows XSS via the username column of the bwRoot.asp page of WADashboard.
Weakness: CWE-79
Which versions are affected by CVE-2021-34540?
It affects 1 product.
Products include Advantech Webaccess.
How do I fix CVE-2021-34540?
No fix has been published for CVE-2021-34540 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-2021-34540 being exploited?
There is no known exploitation of CVE-2021-34540 in the wild and no public exploit code.
Other vulnerabilities in Advantech Webaccess
- CVE-2014-9208 Multiple stack-based buffer overflows in unspecified DLL files in Advantech WebAccess before 8.0.1 allow remote attackers to execute arbitra
- CVE-2021-33023 Advantech WebAccess
- CVE-2021-38389 Advantech WebAccess
- CVE-2021-38408 Memory corruption in Advantech WebAccess
- CVE-2020-12019 Memory corruption in WebAccess Node
Sources
Also known as GHSA-7p7j-x9w2-xpj5.