XSS in Advantech Webaccess\/scada

CVE-2021-22676

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).

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (48.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-22676: held from 0.006 to 0.006.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

  • Advantech Webaccess\/scada
  • Webaccess/scada — versions WebAccess/SCADA versions prior to 8.4.5, WebAccess/SCADA versions prior to 9.0.1

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-22676?
CVE-2021-22676 is a medium-severity vulnerability in Advantech Webaccess\/scada, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-08-10.
How severe is CVE-2021-22676?
Medium severity. CVSS v3 base score is 6.1 out of 10.