EUVD-2026-36794
GHSA-prqv-jwmw-qpp3
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
Network-reachable admin panel justifies AV:N; race-condition-assisted sanitization bypass raises AC:H; administrator role required so PR:H; full CIA impact on the web server.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
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
Lifecycle Timeline
1DescriptionCVE.org
Discuz! X5.0 releases 20260320 through 20260501 contain a local file inclusion vulnerability that allows authenticated administrators to execute arbitrary code by importing a specially crafted plugin configuration containing path traversal sequences in the directory attribute. Attackers can trigger an exception during plugin installation to bypass sanitization routines, causing malicious paths to be stored unsanitized and subsequently passed to include(), which combined with file upload functionality escalates to arbitrary code execution in the context of the web server user.
AnalysisAI
Authenticated remote code execution in Discuz! X5.0 releases 20260320 through 20260501 allows administrators to chain a path traversal flaw in the plugin import routine with file upload functionality to run arbitrary PHP as the web server user. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an authenticated Discuz! … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The provided CVSS 4.0 vector 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 is internally consistent with the description: network-reachable admin panel, low complexity once authenticated, no user interaction, and full CIA impact on the web server. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has compromised or social-engineered a Discuz! X5.0 administrator account uploads an attacker-controlled file (for example an avatar or attachment containing PHP) through the standard upload features, then submits a malicious plugin configuration whose 'directory' attribute contains '../' sequences pointing back to the uploaded file. … |
| Remediation | No vendor-released patch identified at time of analysis, so the primary action is to upgrade to a Discuz! … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
24 hours: Identify all Discuz! …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
More from same product – last 7 days
Authentication bypass in Discuz! X5.0 releases 20260320 through 20260501 allows unauthenticated remote attackers to acce
Unauthenticated PHP Object Injection in the Happyforms WordPress plugin (versions <= 1.26.13) allows remote attackers to
Unauthenticated PHP Object Injection in the Broadcast Live Video WordPress plugin (versions prior to 7.1.3) allows remot
Unauthenticated PHP object injection in the WordPress plugin 'Integration for Keap/Infusionsoft and Contact Form 7, WPFo
Unauthenticated PHP Object Injection in the WordPress plugin Integration for Contact Form 7 and Constant Contact (versio
Share
External POC / Exploit Code
Leaving vuln.today