EUVD-2026-41311
GHSA-7895-6924-w5f6
Severity by source
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Contributor authentication required (PR:L), scope changes to victim browser (S:C); XSS does not directly cause availability impact so A:N is more accurate.
Primary rating from Vendor (Patchstack).
CVSS VectorVendor: Patchstack
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
Lifecycle Timeline
1DescriptionCVE.org
Contributor Cross Site Scripting (XSS) in Mosaic Gallery – Advanced Gallery <= 1.2.0 versions.
AnalysisAI
Stored or reflected Cross-Site Scripting in the Mosaic Gallery - Advanced Gallery WordPress plugin (versions <= 1.2.0) is exploitable by authenticated users holding a Contributor role. A Contributor-level attacker can inject malicious JavaScript into gallery content, which executes in the browsers of higher-privileged users - such as editors or administrators - who subsequently view the affected page, enabling session hijacking or unauthorized administrative action. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold a WordPress Contributor account (or higher) on the target site - this is the primary limiting factor (PR:L per CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD CVSS 3.1 score of 6.5 (Medium) is backed by a vector of AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker registers or already holds a Contributor account on the target WordPress site and embeds a JavaScript payload (such as a cookie-exfiltrating script) within a gallery block or shortcode field in the Mosaic Gallery - Advanced Gallery plugin while drafting a post. When an administrator reviews, edits, or views the post, the injected script executes in the administrator's browser, transmitting their session token to an attacker-controlled endpoint and enabling account takeover. … |
| Remediation | Update the Mosaic Gallery - Advanced Gallery plugin to the latest available version via the WordPress plugin repository or per the vendor's published patch, once confirmed beyond version 1.2.0. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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