CVE-2024-43793Public exploitNetwork attack vector

Stored XSS via unchecked hyperlink schemes

Published Sep 11, 2024 · Updated Sep 11, 2024

Stored XSS in Halo before 2.19.0 allows remote authenticated users to run scripts in site visitors' browsers through crafted links. The editor accepts a mixed-case javascript URL as a hyperlink destination, stores the href without rejecting the executable scheme, and renders it in content. An account with editor access can plant the link, and execution occurs in the reader's Halo browser context with access to origin-scoped data.

CVSS severity6.3
Medium
EPSS probability0.33%
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 Halo before 2.19.0 allows remote authenticated users to run scripts in site visitors' browsers through crafted links. The editor accepts a mixed-case javascript URL as a hyperlink destination, stores the href without rejecting the executable scheme, and renders it in content. An account with editor access can plant the link, and execution occurs in the reader's Halo browser context with access to origin-scoped data.

The record

CVE
CVE-2024-43793
Published
Sep 11, 2024
Updated
Sep 11, 2024
Vendor
Halo
Product
Halo
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <2.19.0
  2. Affected versionversion=< 2.19.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Halo · Haloversion=0 <2.19.0; version=< 2.19.0

Published CVSS scores

6.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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