CVE-2024-28063Public exploitNetwork attack vector

Script execution via unsanitized envelope recipient reflection

Published May 18, 2024 · Updated Feb 13, 2025

Reflected XSS in Kiteworks Email Protection Gateway 7.0.0 and earlier allows remote attackers to execute script via a crafted recipient. EnvelopeOpenServlet inserts the envelopeRecipient value into a meta element's content attribute without sanitizing HTML delimiters. Exploitation requires user interaction with a Registered Envelope flow, and successful script runs in the gateway page's browser context.

CVSS severity6.1
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Kiteworks Email Protection Gateway 7.0.0 and earlier allows remote attackers to execute script via a crafted recipient. EnvelopeOpenServlet inserts the envelopeRecipient value into a meta element's content attribute without sanitizing HTML delimiters. Exploitation requires user interaction with a Registered Envelope flow, and successful script runs in the gateway page's browser context.

The record

CVE
CVE-2024-28063
Published
May 18, 2024
Updated
Feb 13, 2025
Vendor
Kiteworks
Product
Kiteworks Email Protection Gateway
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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?

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

  1. Affected versionversion=0 <=7.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kiteworks · Kiteworks Email Protection Gatewayversion=0 <=7.0.0

Published CVSS scores

6.1CISA-ADPCVSS: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.

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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')
T1203Exploitation for Client Execution

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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