Accela Civic Platform <=21.1 - Cross-Site Scripting

mediumseverity

6.1CVSS score

10%likelihood of exploitation, next 30 days

96%of all CVEs are less likely

Readycheck to confirm it

Accela Civic Platform through 21.1 contains a cross-site scripting vulnerability via ssoAdapter/logoutAction.do successURL.

Impact

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to potential data theft, session hijacking, or defacement of the affected application.

Fix

Upgrade to a patched version of Accela Civic Platform (version >21.1) that includes proper input validation and sanitization.

How to confirm it

Send: GET {{BaseURL}}/ssoAdapter/logoutAction.do?servProvCode=SAFVC&successURL=https://interact.sh/
Positive when: matches in header /(?m)^(?:Location\s*?:\s*?)(?:https?://|//)?(?:[a-zA-Z0-9\-_\.@]*)interact\.sh.*$/

Run it with nuclei: nuclei -id CVE-2021-34370 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2021-34370

info:
  name: Accela Civic Platform <=21.1 - Cross-Site Scripting
  author: 0x_Akoko
  severity: medium
  description: Accela Civic Platform through 21.1 contains a cross-site scripting vulnerability via  ssoAdapter/logoutAction.do successURL.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to execute arbitrary JavaScript code in the context of the victim's browser, leading to potential data theft, session hijacking, or defacement of the affected application.
  remediation: |
    Upgrade to a patched version of Accela Civic Platform (version >21.1) that includes proper input validation and sanitization.
  reference:
    - https://www.exploit-db.com/exploits/49990
    - https://www.accela.com/civic-platform/
    - https://gist.github.com/0xx7/7e9f1b725f7ff98b9239d3cb027b7dc8
    - https://nvd.nist.gov/vuln/detail/CVE-2021-34370
    - 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-2021-34370
    cwe-id: CWE-79
    epss-score: 0.09996
    epss-percentile: 0.95643
    cpe: cpe:2.3:a:accela:civic_platform:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: accela
    product: civic_platform
  tags: cve,cve2021,xss,redirect,accela,edb,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/ssoAdapter/logoutAction.do?servProvCode=SAFVC&successURL=https://interact.sh/"

    matchers:
      - type: regex
        part: header
        regex:
          - '(?m)^(?:Location\s*?:\s*?)(?:https?://|//)?(?:[a-zA-Z0-9\-_\.@]*)interact\.sh.*$'

References

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