CVE-2026-4953Public exploitNetwork attack vector

Internal service access via unrestricted image fetch

Published Mar 27, 2026 · Updated Mar 27, 2026

Server-side request forgery in MingSoft MCMS 5.0 through 5.5.0 allows remote attackers to reach internal services via crafted image URLs. BaseAction.catchImage passes each source[] value from the editor's catchimage action to FileUtil.remoteUrlToMultipartFile without restricting the scheme, host, or destination network. The editor endpoint must be exposed with front-end uploads enabled and outbound connectivity; responses, saved files, or timing can disclose reachable services and retrieved data.

CVSS severity7.3
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in MingSoft MCMS 5.0 through 5.5.0 allows remote attackers to reach internal services via crafted image URLs. BaseAction.catchImage passes each source[] value from the editor's catchimage action to FileUtil.remoteUrlToMultipartFile without restricting the scheme, host, or destination network. The editor endpoint must be exposed with front-end uploads enabled and outbound connectivity; responses, saved files, or timing can disclose reachable services and retrieved data.

The record

CVE
CVE-2026-4953
Published
Mar 27, 2026
Updated
Mar 27, 2026
Vendor
MingSoft
Product
MCMS
Classifications
CWE-918, CAPEC-664, T1190, T1046
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.0
  2. Affected versionversion=5.1
  3. Affected versionversion=5.2
  4. Affected versionversion=5.3
  5. Affected versionversion=5.4
  6. Affected versionversion=5.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MingSoft · MCMSversion=5.0; version=5.1; version=5.2; version=5.3; version=5.4; version=5.5.0

Published CVSS scores

7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P

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 exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery
T1190Exploit Public-Facing Application
T1046Network Service Discovery

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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