CVE-2020-26293
CVSS V2 Medium 4.3
CVSS V3 Medium 6.1
Description
HtmlSanitizer is a .NET library for cleaning HTML fragments and documents from constructs that can lead to XSS attacks. In HtmlSanitizer before version 5.0.372, there is a possible XSS bypass if style tag is allowed. If you have explicitly allowed the `<style>` tag, an attacker could craft HTML that includes script after passing through the sanitizer. The default settings disallow the `<style>` tag so there is no risk if you have not explicitly allowed the `<style>` tag. The problem has been fixed in version 5.0.372.
Overview
- CVE ID
- CVE-2020-26293
- Assigner
- security-advisories@github.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-01-04T19:15:14
- Last Modified Date
- 2021-01-07T20:29:08
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:htmlsanitizer_project:htmlsanitizer:*:*:*:*:*:*:*:* | 1 | OR | 5.0.372 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:N/I:P/A:N
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 4.3
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality Impact
- LOW
- Availability Impact
- NONE
- Base Score
- 6.1
- Base Severity
- MEDIUM
- Exploitability Score
- 2.8
- Impact Score
- 2.7
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/mganss/HtmlSanitizer/security/advisories/GHSA-8j9v-h2vp-2hhv | Third Party Advisory |
| https://github.com/mganss/HtmlSanitizer/commit/a3a7602a44d4155d51ec0fbbedc2a49e9c7e2eb8 | Patch Third Party Advisory |
| https://github.com/mganss/HtmlSanitizer/releases/tag/v5.0.372 | Release Notes Third Party Advisory |
| https://www.nuget.org/packages/HtmlSanitizer/ | Product Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-26293 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26293 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:28:22 | Added to TrackCVE | |||
| 2022-12-05 19:20:39 | 2021-01-04T19:15Z | 2021-01-04T19:15:14 | CVE Published Date | updated |
| 2022-12-05 19:20:39 | 2021-01-07T20:29:08 | CVE Modified Date | updated | |
| 2022-12-05 19:20:39 | Analyzed | Vulnerability Status | updated |