EpiServer Find <13.2.7 - Open Redirect

mediumseverity

6.1CVSS score

4.7%likelihood of exploitation, next 30 days

92%of all CVEs are less likely

Readycheck to confirm it

EpiServer Find before 13.2.7 contains an open redirect vulnerability via the _t_redirect parameter in a crafted URL, such as a /find_v2/_click URL. An attacker can redirect a user to a malicious site and possibly obtain sensitive information, modify data, and/or execute unauthorized operations.

Impact

An attacker can exploit this vulnerability to redirect users to malicious websites, leading to phishing attacks.

Fix

Upgrade to EpiServer Find version 13.2.7 or later to fix the open redirect vulnerability.

How to confirm it

Send: GET {{BaseURL}}/find_v2/_click?_t_id=&_t_q=&_t_hit.id=&_t_redirect=https://interact.sh
Positive when: contains in header "Location: https://interact.sh" AND status 301

Run it with nuclei: nuclei -id CVE-2020-24550 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2020-24550

info:
  name: EpiServer Find <13.2.7 - Open Redirect
  author: dhiyaneshDK
  severity: medium
  description: EpiServer Find before 13.2.7 contains an open redirect vulnerability via the _t_redirect parameter in a crafted URL, such as a /find_v2/_click URL. An attacker can redirect a user to a malicious site and possibly obtain sensitive information, modify data, and/or execute unauthorized operations.
  impact: |
    An attacker can exploit this vulnerability to redirect users to malicious websites, leading to phishing attacks.
  remediation: |
    Upgrade to EpiServer Find version 13.2.7 or later to fix the open redirect vulnerability.
  reference:
    - https://labs.nettitude.com/blog/cve-2020-24550-open-redirect-in-episerver-find/
    - https://nvd.nist.gov/vuln/detail/CVE-2020-24550
    - https://github.com/anonymous364872/Rapier_Tool
    - https://github.com/ARPSyndicate/kenzer-templates
    - https://github.com/Elsfa7-110/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-2020-24550
    cwe-id: CWE-601
    epss-score: 0.04719
    epss-percentile: 0.91908
    cpe: cpe:2.3:a:episerver:find:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: episerver
    product: find
  tags: cve,cve2020,redirect,episerver,vuln

http:
  - method: GET
    path:
      - '{{BaseURL}}/find_v2/_click?_t_id=&_t_q=&_t_hit.id=&_t_redirect=https://interact.sh'

    matchers-condition: and
    matchers:
      - type: word
        part: header
        words:
          - "Location: https://interact.sh"

      - type: status
        status:
          - 301

References

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