CVE-2024-25637Network attack vector

Reflected HTML injection via unsanitized AJAX handler header

Published Jun 26, 2024 · Updated Aug 1, 2024

Reflected HTML injection in October CMS 3.2 through 3.5.14 allows remote authenticated users to receive unescaped HTML via a crafted handler header. The X-October-Request-Handler value is used as the AJAX handler name and inserted into the response without HTML sanitization or escaping. Reaching the reflection requires low-privileged access and a proxy interception tool; normal browser interaction does not expose it.

CVSS severity3.1
Low
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected HTML injection in October CMS 3.2 through 3.5.14 allows remote authenticated users to receive unescaped HTML via a crafted handler header. The X-October-Request-Handler value is used as the AJAX handler name and inserted into the response without HTML sanitization or escaping. Reaching the reflection requires low-privileged access and a proxy interception tool; normal browser interaction does not expose it.

The record

CVE
CVE-2024-25637
Published
Jun 26, 2024
Updated
Aug 1, 2024
Vendor
October CMS
Product
October CMS
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 26, 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

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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=>= 3.2, < 3.5.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

October CMS · October CMSversion=>= 3.2, < 3.5.15

Published CVSS scores

3.1GitHubCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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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