CVE-2021-39161
CVSS V2 Low 2.1
CVSS V3 Medium 5.4
Description
Discourse is an open source platform for community discussion. In affected versions category names can be used for Cross-site scripting(XSS) attacks. This is mitigated by Discourse's default Content Security Policy and this vulnerability only affects sites which have modified or disabled or changed Discourse's default Content Security Policy have allowed for moderators to modify categories. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. Users are advised to ensure that the Content Security Policy is enabled, and has not been modified in a way which would make it more vulnerable to XSS attacks.
Overview
- CVE ID
- CVE-2021-39161
- Assigner
- security-advisories@github.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-08-26T20:15:07
- Last Modified Date
- 2021-09-01T16:58:25
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:* | 1 | OR | 2.7.8 | |
| cpe:2.3:a:discourse:discourse:2.8.0:beta1:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:discourse:discourse:2.8.0:beta2:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:discourse:discourse:2.8.0:beta3:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:discourse:discourse:2.8.0:beta4:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:H/Au:S/C:N/I:P/A:N
- Access Vector
- NETWORK
- Access Compatibility
- HIGH
- Authentication
- SINGLE
- Confidentiality Impact
- NONE
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 2.1
- Severity
- LOW
- Exploitability Score
- 3.9
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality Impact
- LOW
- Availability Impact
- NONE
- Base Score
- 5.4
- Base Severity
- MEDIUM
- Exploitability Score
- 2.3
- Impact Score
- 2.7
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/discourse/discourse/security/advisories/GHSA-xhmc-9jwm-wqph | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-39161 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39161 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 16:08:03 | Added to TrackCVE | |||
| 2022-12-05 09:10:53 | 2021-08-26T20:15Z | 2021-08-26T20:15:07 | CVE Published Date | updated |
| 2022-12-05 09:10:53 | 2021-09-01T16:58:25 | CVE Modified Date | updated | |
| 2022-12-05 09:10:53 | Analyzed | Vulnerability Status | updated |