Which versions of Java are affected by CVE-2026-4953?

mingSoft MCMS versions 5.5.0 and earlier contain a server-side request forgery vulnerability in the Editor Endpoint that allows unauthenticated attackers to hijack the application server to make…

Is there a public PoC exploit available for CVE-2026-4953?

Yes, a public proof-of-concept exploit is available for CVE-2026-4953. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-4953?

Within 24 hours: Identify and inventory all mingSoft MCMS deployments running version 5.5.0 or earlier; implement network segmentation to restrict outbound HTTP/HTTPS from MCMS servers and disable or restrict access to the Editor Endpoint's catchImage function if operationally feasible. Within 7 days: Apply input validation and WAF rules to reject suspicious catchimage parameter values; conduct network traffic analysis to detect anomalous outbound requests from MCMS servers. Within 30 days: Monitor mingSoft security advisories for patched version release; prepare for immediate patching upon availability; consider evaluation of alternative content management solutions if patch timeline becomes extended.

Java CVE-2026-4953

Q: What is the CVSS score of CVE-2026-4953?

CVE-2026-4953 has a CVSS 4.0 base score of 5.5 (Medium). CVSS vector: CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

EUVD-2026-16629 MEDIUM

Server-Side Request Forgery (SSRF) (CWE-918)

2026-03-27 VulDB

GHSA-xmm3-9x39-98r5

Java SSRF Mcms Mingsoft

5.5

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

5.5 MEDIUM

CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

CVSS changed

Apr 29, 2026 - 01:11 NVD

6.9 (MEDIUM) 5.5 (MEDIUM)

PoC Detected

Mar 30, 2026 - 13:26 vuln.today

Public exploit code

EUVD ID Assigned

Mar 27, 2026 - 14:30 euvd

EUVD-2026-16629

Analysis Generated

Mar 27, 2026 - 14:30 vuln.today

CVE Published

Mar 27, 2026 - 14:13 nvd

MEDIUM 6.9

DescriptionCVE.org

A weakness has been identified in mingSoft MCMS 迄 5.5.0. This issue affects the function catchImage of the file net/mingsoft/cms/action/BaseAction.java of the component Editor Endpoint. Executing a manipulation of the argument catchimage can lead to server-side request forgery. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks.

AnalysisAI

Server-side request forgery in mingSoft MCMS versions through 5.5.0 enables remote unauthenticated attackers to force the application server to make arbitrary HTTP requests to internal or external systems via the catchimage parameter in the Editor Endpoint's catchImage function. Publicly available exploit code exists (GitHub POC published), increasing immediate risk. The CVSS score of 7.3 reflects network-based attack vector with no authentication required and impacts to confidentiality, integrity, and availability.

Technical ContextAI

The vulnerability resides in the catchImage function within net/mingsoft/cms/action/BaseAction.java of the mingSoft MCMS content management system, affecting versions up to and including 5.5.0 (CPE: cpe:2.3:a:mingsoft:mcms:*:*:*:*:*:*:*:*). This is a CWE-918 Server-Side Request Forgery flaw where insufficient validation of the catchimage parameter allows attackers to manipulate the application into initiating requests to arbitrary URLs. SSRF vulnerabilities in Java-based web applications commonly arise when user-controlled input is passed directly to HTTP client libraries without proper URL validation, whitelist enforcement, or network-level restrictions. The Editor Endpoint context suggests this affects content editing functionality where image retrieval operations are performed server-side.

RemediationAI

No vendor-released patch version has been identified in the available intelligence at time of analysis. Organizations should monitor the official mingSoft MCMS project repository and security advisories for version releases beyond 5.5.0 that address CVE-2026-4953. Until patching is possible, implement network-level controls including restricting outbound HTTP/HTTPS connections from application servers using egress filtering, deploying web application firewall rules to validate or block the catchimage parameter containing non-whitelisted URLs, and segmenting MCMS servers from sensitive internal networks to limit SSRF pivot potential. Consider disabling or restricting access to the Editor Endpoint catchImage functionality if not operationally required. Reference VulDB advisories at https://vuldb.com/?id.353831 and https://vuldb.com/?ctiid.353831 for updates, and review the public exploit at https://github.com/wing3e/public_exp/issues/3 to understand attack patterns for detection rule development.