id: CVE-2021-22873 info: name: Revive Adserver <5.1.0 - Open Redirect author: pudsec severity: medium description: Revive Adserver before 5.1.0 contains an open redirect vulnerability via the dest, oadest, and ct0 parameters of the lg.php and ck.php delivery scripts. An attacker can redirect a user to a malicious site and possibly obtain sensitive information, modify data, and/or execute unauthorized operations. reference: - https://hackerone.com/reports/1081406 - https://github.com/revive-adserver/revive-adserver/issues/1068 - http://seclists.org/fulldisclosure/2021/Jan/60 - https://nvd.nist.gov/vuln/detail/CVE-2021-22873 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-2021-22873 cwe-id: CWE-601 metadata: shodan-query: http.favicon.hash:106844876 verified: "true" tags: cve2021,redirect,revive,hackerone,seclists,cve requests: - method: GET path: - "{{BaseURL}}/ads/www/delivery/lg.php?dest=http://interact.sh" - "{{BaseURL}}/adserve/www/delivery/lg.php?dest=http://interact.sh" - "{{BaseURL}}/adserver/www/delivery/lg.php?dest=http://interact.sh" - "{{BaseURL}}/openx/www/delivery/lg.php?dest=http://interact.sh" - "{{BaseURL}}/revive/www/delivery/lg.php?dest=http://interact.sh" - "{{BaseURL}}/www/delivery/lg.php?dest=http://interact.sh" stop-at-first-match: true host-redirects: true max-redirects: 2 matchers: - type: regex part: header regex: - '(?m)^(?:Location\s*?:\s*?)(?:https?:\/\/|\/\/|\/\\\\|\/\\)(?:[a-zA-Z0-9\-_\.@]*)interact\.sh\/?(\/|[^.].*)?$' # https://regex101.com/r/L403F0/1 # Enhanced by md on 2022/10/14