CVE-2026-52203Public exploitNetwork attack vector

Authenticated internal resource disclosure via SSRF

Published Jul 17, 2026 · Updated Jul 17, 2026

SSRF in MCMS 6.1.1 allows remote authenticated users to read internal HTTP resources through the source parameter. The catchimage action at /ms/editor.do fetches each source[] URL server-side without restricting loopback or private-network destinations. A low-privilege account is sufficient, and the bounded consequence is disclosure of HTTP content reachable from the MCMS server.

CVSS severityUnavailable
Unscored
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in MCMS 6.1.1 allows remote authenticated users to read internal HTTP resources through the source parameter. The catchimage action at /ms/editor.do fetches each source[] URL server-side without restricting loopback or private-network destinations. A low-privilege account is sufficient, and the bounded consequence is disclosure of HTTP content reachable from the MCMS server.

The record

CVE
CVE-2026-52203
Published
Jul 17, 2026
Updated
Jul 17, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 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

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 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 exploitPublished

Weakness, pattern, technique

T1190Exploit Public-Facing Application

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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