CVE-2025-8267Public exploitNetwork attack vector

SSRF filter bypass via omitted multicast range

Published Jul 28, 2025 · Updated Jul 28, 2025

SSRF in ssrfcheck before 1.2.0 allows remote attackers to pass multicast URLs as safe for use by a consuming backend. The PRIVATE_CIDRS denylist in src/is-private-ip.js omits 224.0.0.0/4, so isSSRFSafeURL returns true for URLs targeting multicast addresses. Exploitation requires an application to trust that result and fetch attacker-controlled URLs, enabling requests to multicast-addressed services.

CVSS severity8.2
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in ssrfcheck before 1.2.0 allows remote attackers to pass multicast URLs as safe for use by a consuming backend. The PRIVATE_CIDRS denylist in src/is-private-ip.js omits 224.0.0.0/4, so isSSRFSafeURL returns true for URLs targeting multicast addresses. Exploitation requires an application to trust that result and fetch attacker-controlled URLs, enabling requests to multicast-addressed services.

The record

CVE
CVE-2025-8267
Published
Jul 28, 2025
Updated
Jul 28, 2025
Vendor
Felippe Regazio
Product
ssrfcheck
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <1.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Felippe Regazio · ssrfcheckversion=0 <1.2.0

Published CVSS scores

7.8SnykCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
8.2SnykCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
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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