CVE-2025-66492Network attack vector

Session hijacking via reflected ajax parameter injection

Published Dec 12, 2025 · Updated Dec 12, 2025

Reflected XSS in affected Masa CMS 7.2–7.5 releases allows remote attackers to execute scripts through a crafted ajax query parameter. In admin/common/layouts/template.cfm and compact.cfm, CFML emits request-controlled rc.ajax content directly into the HTML head without neutralization. Exploitation requires a victim to open a crafted link; the injected script then runs in that victim's session and can read session data or alter rendered content.

CVSS severity8.2
High
EPSS probability0.25%
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 affected Masa CMS 7.2–7.5 releases allows remote attackers to execute scripts through a crafted ajax query parameter. In admin/common/layouts/template.cfm and compact.cfm, CFML emits request-controlled rc.ajax content directly into the HTML head without neutralization. Exploitation requires a victim to open a crafted link; the injected script then runs in that victim's session and can read session data or alter rendered content.

The record

CVE
CVE-2025-66492
Published
Dec 12, 2025
Updated
Dec 12, 2025
Vendor
Masa CMS
Product
Masa CMS
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 12, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 12, 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=< 7.2.9
  2. Affected versionversion=>= 7.3.1, < 7.3.14
  3. Affected versionversion=>= 7.4.0-alpha.1, < 7.4.8
  4. Affected versionversion=>= 7.5.0, < 7.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Masa CMS · Masa CMSversion=< 7.2.9; version=>= 7.3.1, < 7.3.14; version=>= 7.4.0-alpha.1, < 7.4.8; version=>= 7.5.0, < 7.5.2

Published CVSS scores

8.2GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
6.1NIST NVDCVSS: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')
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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