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CVE-2021-30119 (GCVE-0-2021-30119)

Vulnerability from cvelistv5 – Published: 2021-07-09 13:20 – Updated: 2026-08-14 03:55
VLAI Previdian
Title
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`
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
References
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2021-30119

Status: Confirmed

Status Updated: 2026-08-14 04:30 UTC

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: 0.52687 | Used in malware: unknown | Not yet in CISA KEV: True

Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel


Details
Feed KEVIntel (kevintel.com)
Title Authenticated Authenticated reflective XSS in Kaseya VSA <= v9.5.6
Vendor Kaseya
Product VSA
Added Date 2026-08-14T04:30:51.519Z
Cvss Score 5.4
Epss Score 0.52687
Cvss Severity MEDIUM
Epss Percentile 0.9887
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True

References

Created: 2026-08-14 05:00 UTC | Updated: 2026-08-14 05:00 UTC
Show details on NVD website

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            "url": "https://csirt.divd.nl/DIVD-2021-00011"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Exploit",
              "Third Party Advisory"
            ],
            "url": "https://csirt.divd.nl/CVE-2021-30119"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://csirt.divd.nl/DIVD-2021-00011"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-79"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-03-27T14:13:55+00:00",
      "cve": "CVE-2021-30119",
      "id": "CVE-2021-30119",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Authenticated Authenticated reflective XSS in Kaseya VSA \u003c= v9.5.6",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-30119.json",
      "version": "3"
    }
  }
}



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Taxonomy of the tags.


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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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Detection rules are retrieved from Rulezet.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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