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Gallery PhotoBlocks EUVDEUVD-2026-69921

| CVE-2026-84781 MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2026-09-02 Patchstack GHSA-hxfx-f534-wxjv
WordPress XSS Wordpress Plugin Gallery Photoblocks Wp Chill
6.5
CVSS 3.1 · Vendor: Patchstack
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Severity by source

Vendor (Patchstack) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
vuln.today AI
5.4 MEDIUM

Stored XSS via contributor role (PR:L), admin must view content (UI:R), scope change to admin browser (S:C); no availability impact for XSS.

3.1 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
Low

Lifecycle Timeline

1
Analysis Generated
Sep 02, 2026 - 12:05 vuln.today

DescriptionCVE.org

Contributor Cross Site Scripting (XSS) in Gallery PhotoBlocks <= 1.3.4 versions.

AnalysisAI

Stored cross-site scripting in the Gallery PhotoBlocks WordPress plugin (versions <= 1.3.4) allows authenticated contributors to inject malicious scripts into gallery content, which execute in the browsers of higher-privileged users such as editors or administrators who view the affected content. The scope change (S:C in the CVSS vector) reflects the cross-context impact: attacker-controlled script runs in the victim's authenticated session, enabling session hijacking, credential theft, or unauthorized administrative actions. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Vulnerability AssessmentAI

Exploitation Exploitation requires the attacker to hold at minimum a WordPress Contributor role on the target installation - anonymous or unauthenticated users cannot exploit this vulnerability. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The 6.5 CVSS base score reflects a moderate-severity stored XSS: exploitable remotely with low complexity, but requiring a Contributor-level WordPress account (PR:L) and victim interaction (UI:R). … 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 the Gallery PhotoBlocks plugin to a version released after 1.3.4 via the WordPress plugin dashboard or the WP Chill repository - the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/photoblocks-grid-gallery/vulnerability/wordpress-gallery-photoblocks-plugin-1-3-4-cross-site-scripting-xss-vulnerability should be consulted for the confirmed fixed version number, which was not independently verified from the available input data. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-69921 vulnerability details – vuln.today
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