EUVD-2026-64248
GHSA-8vxv-gf52-gm5h
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
PR:H reflects required privileged account; UI:R captures passive victim browsing; S:C and C:L/I:L model session theft in victim browsers.
Primary rating from Vendor (Joomla).
CVSS VectorVendor: Joomla
Lifecycle Timeline
2DescriptionCVE.org
Joomla Extension - joomgalleryfriends.net - Stored XSS in JoomGallery < 4.3.1 - An authenticated, privileged can store an XSS payload in any image causing JS execution in every visitor's browser.
AnalysisAI
Stored cross-site scripting in JoomGallery (Joomla extension by joomgalleryfriends.net) versions prior to 4.3.1 allows a privileged authenticated attacker to inject a persistent JavaScript payload into image metadata, which then executes in the browser of every subsequent visitor who views that image or gallery. The attacker plants the payload once and it fires automatically for all future visitors, making this a force-multiplier attack despite the high-privilege prerequisite. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid authenticated account with privileged access to the JoomGallery extension's image management back-end within the Joomla CMS - the CVE description explicitly states 'authenticated, privileged', consistent with the CVSS PR:H metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:H/UI:N) scores 8.6, but several metric choices warrant scrutiny. … 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 | Upgrade JoomGallery to version 4.3.1 or later, which is the vendor-indicated fix boundary per the CVE description. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, verify your JoomGallery version and assess whether it is prior to 4.3.1; if running an affected version and cannot immediately update, disable the JoomGallery extension to prevent exploitation. …
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Same weakness CWE-79 – Cross-site Scripting (XSS)
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External POC / Exploit Code
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