XSS in Kaseya Vsa
CVE-2021-30119
Authenticated reflective XSS in HelpDeskTab/rcResults.asp The parameter result of /HelpDeskTab/rcResults.asp is insecurely returned in the requested web page and can be used to perform a Cross Site Scripting attack Example request: `https://x.x.x.x/HelpDeskTab/rcResults.asp?result=<script>alert(document.cookie)</script>` The same is true for the parameter FileName of /done.asp Eaxmple request: `https://x.x.x.x/done.asp?FileName=";</script><script>alert(1);a="&PathData=&originalName=shell.aspx&FileSize=4388&TimeElapsed=00:00:00.078`
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.503 (98.9th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 98.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.527 · newest: 0.503 · change: -0.024
Affected products
Weakness classification (CWE)
References
- csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/ (Patch, Third Party Advisory)
- csirt.divd.nl/DIVD-2021-00011 (Patch, Third Party Advisory)
- csirt.divd.nl/CVE-2021-30119 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-30119?
- CVE-2021-30119 is a medium-severity vulnerability in Kaseya Vsa, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-07-09.
- How severe is CVE-2021-30119?
- Medium severity. CVSS v3 base score is 5.4 out of 10.