CVE-2024-20504Network attack vector

Authenticated browser script execution via unvalidated input

Published Nov 6, 2024 · Updated Nov 6, 2024

Stored XSS in Cisco Secure Email, Secure Web Appliance, and Secure Email and Web Manager allows remote authenticated users to run scripts. The web management interface stores insufficiently validated input from a crafted link and later renders it in a user's browser. Exploitation requires valid credentials and a user who clicks the link; execution is limited to the interface's browser context and browser-accessible data.

CVSS severity5.4
Medium
EPSS probability0.28%
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 Cisco Secure Email, Secure Web Appliance, and Secure Email and Web Manager allows remote authenticated users to run scripts. The web management interface stores insufficiently validated input from a crafted link and later renders it in a user's browser. Exploitation requires valid credentials and a user who clicks the link; execution is limited to the interface's browser context and browser-accessible data.

The record

CVE
CVE-2024-20504
Published
Nov 6, 2024
Updated
Nov 6, 2024
Vendor
ClamAV
Product
Cisco Secure Email
Classifications
CWE-80, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 6, 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=14.0.0-698
  2. Affected versionversion=14.2.0-620
  3. Affected versionversion=14.2.1-020
  4. Affected versionversion=14.3.0-032
  5. Affected versionversion=15.0.0-104
  6. Affected versionversion=15.0.1-030
  7. Affected versionversion=15.5.0-048
  8. Affected versionversion=15.5.1-055

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco Secure Emailversion=14.0.0-698; version=14.2.0-620; version=14.2.1-020; version=14.3.0-032; version=15.0.0-104; version=15.0.1-030; version=15.5.0-048; version=15.5.1-055
ClamAV · Cisco Secure Web Applianceversion=14.0.2-012; version=14.0.3-014; version=14.0.4-005; version=14.0.5-007; version=14.1.0-032; version=14.1.0-041; version=14.1.0-047; version=14.5.0-498; version=14.5.1-008; version=14.5.1-016; version=14.5.1-510; version=14.5.1-607; version=14.5.2-011; version=14.5.3-033; version=15.0.0-322; version=15.0.0-355; version=15.1.0-287; version=15.2.0-116; version=15.2.0-164
ClamAV · Cisco Secure Email and Web Managerversion=14.0.0-404; version=14.1.0-223; version=14.1.0-227; version=14.2.0-212; version=14.2.0-224; version=14.2.1-020; version=14.3.0-120; version=15.0.0-334; version=15.5.1-024; version=15.5.1-029

Published CVSS scores

5.4Cisco Systems, Inc.CVSS: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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