CVE-2024-28403Public exploitNetwork attack vector

Stored XSS via unsanitized VPN comments

Published Mar 15, 2024 · Updated Mar 27, 2025

Stored XSS in the VPN page of TOTOLINK X2000R firmware before 1.0.0-B20231213.1013 allows remote authenticated users to run script. The PPTP and L2TP VPN forms store the Comment field without neutralizing HTML, causing a submitted SVG onload handler to execute when the page renders. A low-privileged management-session account must save the payload and another user must visit the VPN page, where the script runs in that user's browser context.

CVSS severity5.4
Medium
EPSS probability0.39%
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 the VPN page of TOTOLINK X2000R firmware before 1.0.0-B20231213.1013 allows remote authenticated users to run script. The PPTP and L2TP VPN forms store the Comment field without neutralizing HTML, causing a submitted SVG onload handler to execute when the page renders. A low-privileged management-session account must save the payload and another user must visit the VPN page, where the script runs in that user's browser context.

The record

CVE
CVE-2024-28403
Published
Mar 15, 2024
Updated
Mar 27, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/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 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')

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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