CVE-2024-20258Network attack vector

Browser script execution via reflected input

Published May 15, 2024 · Updated Aug 1, 2024

Reflected XSS in Cisco Secure Email products' AsyncOS management interface allows remote attackers to execute browser scripts. The interface reflects insufficiently validated input from a crafted link into a page, where the browser interprets it as script. Exploitation requires a management-interface user to click the link and permits script execution in that interface or access to sensitive browser data.

CVSS severity6.1
Medium
EPSS probability0.32%
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 Cisco Secure Email products' AsyncOS management interface allows remote attackers to execute browser scripts. The interface reflects insufficiently validated input from a crafted link into a page, where the browser interprets it as script. Exploitation requires a management-interface user to click the link and permits script execution in that interface or access to sensitive browser data.

The record

CVE
CVE-2024-20258
Published
May 15, 2024
Updated
Aug 1, 2024
Vendor
ClamAV
Product
Cisco Secure Email
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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=11.0.3-238
  2. Affected versionversion=11.0.3-238 <=15.5.0-048
  3. Affected versionversion=11.1.0-069
  4. Affected versionversion=11.1.0-128
  5. Affected versionversion=11.1.0-131
  6. Affected versionversion=12.0.0-419
  7. Affected versionversion=12.1.0-071
  8. Affected versionversion=12.1.0-087
  9. Affected versionversion=12.1.0-089
  10. Affected versionversion=12.5.0-066
  11. Affected versionversion=12.5.3-041
  12. Affected versionversion=12.5.4-041
  13. Affected versionversion=13.0.0-392
  14. Affected versionversion=13.0.5-007
  15. Affected versionversion=13.5.1-277
  16. Affected versionversion=13.5.4-038
  17. Affected versionversion=14.0.0-698
  18. Affected versionversion=14.2.0-620
  19. Affected versionversion=14.2.1-020
  20. Affected versionversion=14.3.0-032
  21. Affected versionversion=15.0.0-104
  22. Affected versionversion=15.0.1-030
  23. Affected versionversion=15.5.0-048

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClamAV · Cisco Secure Emailversion=11.0.3-238; version=11.0.3-238 <=15.5.0-048; version=11.1.0-069; version=11.1.0-128; version=11.1.0-131; version=12.0.0-419; version=12.1.0-071; version=12.1.0-087; version=12.1.0-089; version=12.5.0-066; version=12.5.3-041; version=12.5.4-041; version=13.0.0-392; version=13.0.5-007; version=13.5.1-277; version=13.5.4-038; version=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
ClamAV · Cisco Secure Email and Web Managerversion=11.0.0-115; version=11.0.1-161; version=11.5.1-105; version=12.0.0-452; version=12.0.1-011; version=12.5.0-636; version=12.5.0-658; version=12.5.0-670; version=12.5.0-678; version=12.8.1-002; version=12.8.1-021; version=13.0.0-277; version=13.6.2-078; version=13.8.1-068; version=13.8.1-074; version=13.8.1-108; version=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=9.0.0-087; version=9.0.0-087 <=15.0.0-334

Published CVSS scores

6.1Cisco Systems, 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 exploitUnconfirmed

Weakness, pattern, technique

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

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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