CVE-2024-37304Public exploitNetwork attack vector

Stored XSS via unsanitized Markdown autolinks

Published Jun 12, 2024 · Updated Aug 2, 2024

Stored XSS in NuGet Gallery before 2024.05.28 allows remote attackers to execute JavaScript in a package-page visitor's browser. MarkdownService.GetHtmlFromMarkdownMarkdig returns rendered Markdig HTML without removing autolink anchors whose href uses the javascript scheme. Exploitation requires a crafted package ReadMe and a visitor who clicks the rendered link; the script can redirect the visitor, spoof page content, or read page data, but HttpOnly cookies remain inaccessible.

CVSS severity6.1
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in NuGet Gallery before 2024.05.28 allows remote attackers to execute JavaScript in a package-page visitor's browser. MarkdownService.GetHtmlFromMarkdownMarkdig returns rendered Markdig HTML without removing autolink anchors whose href uses the javascript scheme. Exploitation requires a crafted package ReadMe and a visitor who clicks the rendered link; the script can redirect the visitor, spoof page content, or read page data, but HttpOnly cookies remain inaccessible.

The record

CVE
CVE-2024-37304
Published
Jun 12, 2024
Updated
Aug 2, 2024
Vendor
Gnuget
Product
NuGet Gallery
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2024.05.28

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gnuget · NuGet Galleryversion=< 2024.05.28

Published CVSS scores

6.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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