CVE-2021-30119 (GCVE-0-2021-30119)
Vulnerability from cvelistv5 – Published: 2021-07-09 13:20 – Updated: 2026-08-14 03:55Title
Authenticated Authenticated reflective XSS in Kaseya VSA <= v9.5.6
Summary
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`
Severity
5.4 (Medium)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2021-07-06 00:00 UTC
CWE
- n/a
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://csirt.divd.nl/2021/07/07/Kaseya-Limited-D… | x_refsource_CONFIRM |
| https://csirt.divd.nl/DIVD-2021-00011 | x_refsource_CONFIRM |
| https://csirt.divd.nl/CVE-2021-30119 | x_refsource_CONFIRM |
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: e60f6b6b-3300-4d94-b5a3-4a242233329f
Exploited: Yes
Timestamps
First Seen: 2026-08-14
Asserted: 2026-08-14
Scope
Notes: Authenticated Authenticated reflective XSS in Kaseya VSA <= v9.5.6 | Affected: Kaseya / VSA | CVSS: 5.4 (MEDIUM) | EPSS: 0.50323 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence
Type: Public Report
Signal: Successful Exploitation
Confidence: 70%
Source: previdian
Details
| Feed | Previdian (previdian.com) |
|---|---|
| Title | Authenticated Authenticated reflective XSS in Kaseya VSA <= v9.5.6 |
| Cve Id | CVE-2021-30119 |
| Vendor | Kaseya |
| Ghsa Id | GHSA-F43V-WH9X-RGQ6 |
| Product | VSA |
| Added Date | 2026-08-14T04:30:51.519Z |
| Cvss Score | 5.4 |
| Epss Score | 0.50323 |
| Previous Ids | |
| Cvss Severity | MEDIUM |
| Virtual Patch | False |
| Cvss Estimated | False |
| Epss Percentile | 0.98878 |
| Used In Malware | unknown |
| Vulnerability Id | CVE-2021-30119 |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | True |
References
Created: 2026-10-02 09:09 CEST
| Updated: 2026-10-02 09:09 CEST
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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