CVE-2021-30119
MediumExploitedPublic exploitAuthenticated 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:…
Published Jul 9, 2021 · Updated Aug 14, 2026
Key Facts
Patch immediately- CVE-2021-30119 is a medium-severity vulnerability (CVSS 5.4 v3.1) affecting Vsa (Kaseya).
- It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Jul 6, 2021 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 53% probability of exploitation in the next 30 days.
- Fixed versions are available, including Vsa 9.5.7.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
5.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
EPSS (30-day exploit likelihood)
53%
Higher than 98.9% of all scored CVEs
Exploited in the wild
Yes
2 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2021-30119 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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=alert(document.cookie) The same is true for the parameter FileName of /done.asp Eaxmple request: https://x.x.x.x/done.asp?FileName=";alert(1);a="&PathData=&originalName=shell.aspx&FileSize=4388&TimeElapsed=00:00:00.078
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Jul 6, 2021 | n/a | Known |
| CIRCL KEV | Aug 14, 2026 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| VsaKaseya | See advisory | 9.5.7 |
Patched Releases
Vsa
9.5.7
Timeline
Added to Industry KEV feed
Jul 6, 2021
Publicly disclosed
Jul 9, 2021
Added to CIRCL KEV
Aug 14, 2026
Last updated
Aug 14, 2026
Weakness Type
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- patchhttps://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/
- patchhttps://csirt.divd.nl/DIVD-2021-00011
- exploithttps://csirt.divd.nl/CVE-2021-30119
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
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=alert(document.cookie) The same is tru…
Affected: Vsa (Kaseya). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Jul 6, 2021 and is known to be used in ransomware campaigns.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Vsa 9.5.7.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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