CVE-2024-57273Public exploitNetwork attack vector

Stored XSS via unencoded ACB reason field

Published May 14, 2025 · Updated Jul 27, 2026

Stored XSS in Netgate pfSense Plus before 25.07 and CE before 2.8.0 allows remote attackers to run JavaScript in an administrator's browser. The services_acb.php backup list inserts the server-supplied reason field into HTML without encoding it. Exploitation requires ACB, knowledge of the device key, and an administrator to open the poisoned list; script execution can expose session data.

CVSS severity5.4
Medium
EPSS probability1.24%
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 Netgate pfSense Plus before 25.07 and CE before 2.8.0 allows remote attackers to run JavaScript in an administrator's browser. The services_acb.php backup list inserts the server-supplied reason field into HTML without encoding it. Exploitation requires ACB, knowledge of the device key, and an administrator to open the poisoned list; script execution can expose session data.

The record

CVE
CVE-2024-57273
Published
May 14, 2025
Updated
Jul 27, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 27, 2026Record 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

5.4GitHub Advisory DatabaseCVSS: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 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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