EUVD-2026-67774
GHSA-7qwg-675j-8j75
Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Planting the payload requires site manager or administrator access to navigation configuration, so PR:H is more accurate than the published PR:N.
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
4DescriptionCVE.org
Cross Site Scripting vulnerability in Omeka S v.4.2.0 allows a remote attacker to execute arbitrary code via the site navigation custom URL function
AnalysisAI
Cross-site scripting via javascript: URI injection in Omeka S 4.2.0 allows an attacker who controls site navigation configuration to plant a malicious custom URL that executes arbitrary JavaScript in any visitor's browser when the navigation link is clicked. The flaw resides in the Url.php navigation link handler, which failed to reject URLs using the javascript: scheme. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two preconditions: first, the attacker must have Omeka S site manager or administrator-level access to configure site navigation custom URLs (a privileged operation, contradicting the PR:N in the published CVSS vector); second, a victim user must actively click the malicious navigation link (UI:R is accurately reflected). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The published CVSS score of 6.1 (Medium) uses AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Update Omeka S to a release that incorporates commit 8d47b0ef2dfabc1dd8c52893400321d1fbb5b5f4, which adds `javascript:` scheme rejection in the navigation URL validator. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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