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CVE-2020-26293

21
FAUCET Score

CVE-2020-26293 describes a cross-site scripting (XSS) bypass vulnerability in the HtmlSanitizer .NET library, affecting versions prior to 5.0.372. This flaw allows an attacker to inject malicious scripts if the application explicitly permits the use of the HTML style tag. The vulnerability carries a CVSS score of 6.1 (Medium), indicating that it can be exploited over a network with low complexity, requiring user interaction, and potentially leading to limited impact on confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.0.372CPE matchmatch criteria
cpe:2.3:a:htmlsanitizer_project:htmlsanitizer:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.6
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.00%
Probability of exploitation in next 30 days
EPSS Percentile
59.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0100 is in the 71st percentile among its peer group of 26,221 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
nugetpatch availablevia ghsa
Product: HtmlSanitizerFixed in: 5.0.372

Vendor Advisories (1)

nugetGHSA-8j9v-h2vp-2hhvlow

XSS in HtmlSanitizer

Jan 4, 2021

References

github.com / mganss/HtmlSanitizer/commit/a3a7602a44d4155d51ec0fbbedc2a49e9c7e2eb8
PatchThird Party Advisory
github.com / mganss/HtmlSanitizer/releases/tag/v5.0.372
Release NotesThird Party Advisory
github.com / mganss/HtmlSanitizer/security/advisories/GHSA-8j9v-h2vp-2hhv
Third Party Advisory
nuget.org / packages/HtmlSanitizer
ProductThird Party Advisory