CVE-2026-52307Public exploitNetwork attack vector

Stored script execution via crafted title field

Published Sep 8, 2026 · Updated Sep 8, 2026

Stored XSS in ClassCMS 1CMS 5.6 allows remote authenticated users to execute scripts in victims' browsers through a crafted column title. The Column Management Article Edit page stores the title payload and later renders it in article lists or detail pages without preventing browser interpretation as script or HTML. Administrator privileges are required to plant the payload, and execution occurs when another user views an affected page.

CVSS severityUnavailable
Unscored
EPSS probability0.27%
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 ClassCMS 1CMS 5.6 allows remote authenticated users to execute scripts in victims' browsers through a crafted column title. The Column Management Article Edit page stores the title payload and later renders it in article lists or detail pages without preventing browser interpretation as script or HTML. Administrator privileges are required to plant the payload, and execution occurs when another user views an affected page.

The record

CVE
CVE-2026-52307
Published
Sep 8, 2026
Updated
Sep 8, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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 privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

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.

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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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