CVE-2025-52362

Critical

Published: 21 July 2025

Published

21 July 2025

Modified

15 April 2026

KEV Added

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Patch

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CVSS Score 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Score 0.0010 27.5th percentile

Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-52362 is a critical-severity SSRF (CWE-918) vulnerability. Its CVSS base score is 9.1 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 27.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and AC-4 (Information Flow Enforcement).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190). What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Directly addresses the core issue of inadequate input validation for the _proxurl parameter by requiring comprehensive checks on URL inputs to block SSRF exploitation.

SC-7 Boundary Protection partial match

preventdetect

Monitors and controls communications at system boundaries to block or detect unauthorized outbound requests triggered by SSRF to internal resources.

AC-4 Information Flow Enforcement partial match

prevent

Enforces information flow control policies to restrict server-side requests from reaching unauthorized destinations exploited via SSRF.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

Why these techniques?

SSRF in public-facing PHProxy directly matches exploitation of a public-facing application (T1190) via crafted external requests.

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

Server-Side Request Forgery (SSRF) vulnerability exists in the URL processing functionality of PHProxy version 1.1.1 and prior. The input validation for the _proxurl parameter can be bypassed, allowing a remote, unauthenticated attacker to submit a specially crafted URL

Deeper analysisAI

CVE-2025-52362, published on 2025-07-21, is a Server-Side Request Forgery (SSRF) vulnerability classified under CWE-918 in the URL processing functionality of PHProxy version 1.1.1 and prior. The issue stems from inadequate input validation for the _proxurl parameter, which can be bypassed by attackers submitting malicious input.

A remote, unauthenticated attacker can exploit this vulnerability over the network with low complexity and no user interaction required, as indicated by its CVSS v3.1 base score of 9.1 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N). Successful exploitation allows the attacker to submit a specially crafted URL, potentially leading to high confidentiality and integrity impacts through unauthorized server-side requests.

Mitigation details and additional information are available in the referenced advisories, including a Gist at https://gist.github.com/Shulelk/a18c11866be8609b22ff5df780a42422 and the PHProxy GitHub repository at https://github.com/PHProxy/phproxy.