CVE-2026-42141Network attack vector

Authenticated SSRF via unrestricted Library URL fetch

Published May 12, 2026 · Updated May 12, 2026

SSRF in Xibo CMS before 4.4.1 allows remote authenticated users with Library upload rights to make server-side HTTP requests. The /library/uploadUrl workflow fetches a caller-supplied URL without restricting the destination to trusted hosts or excluding internal addresses. Library upload permission is required; successful exploitation can scan internal services, read cloud metadata, or exfiltrate data reachable from the CMS server.

CVSS severity7.7
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Xibo CMS before 4.4.1 allows remote authenticated users with Library upload rights to make server-side HTTP requests. The /library/uploadUrl workflow fetches a caller-supplied URL without restricting the destination to trusted hosts or excluding internal addresses. Library upload permission is required; successful exploitation can scan internal services, read cloud metadata, or exfiltrate data reachable from the CMS server.

The record

CVE
CVE-2026-42141
Published
May 12, 2026
Updated
May 12, 2026
Vendor
Xibo Signage
Product
Xibo CMS
Classifications
CWE-918, T1046
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 12, 2026CVE publishedPublication date reported by the CVE source.
  2. May 12, 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?

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

  1. Affected versionversion=< 4.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Xibo Signage · Xibo CMSversion=< 4.4.1

Published CVSS scores

7.7GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1046Network Service Discovery

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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