EUVD-2026-43278
GHSA-m89g-6gv4-875j
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/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
Admin credentials required to inject (PR:H); stored XSS executes in victim's browser scope (S:C, UI:R); low C and I reflect session/content impact with no server-side confidentiality or availability loss.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/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
3DescriptionCVE.org
A vulnerability was identified in SourceCodester Online Book Store System 1.0. This issue affects some unknown processing of the component User Management Module. Such manipulation of the argument Name/Username leads to cross site scripting. The attack can be executed remotely. The exploit is publicly available and might be used.
AnalysisAI
Stored cross-site scripting (XSS) in SourceCodester Online Book Store System 1.0 allows a high-privileged authenticated attacker to inject malicious script payloads via the Name or Username fields in the User Management Module, which then execute in the browsers of other users who view the affected page. A publicly available proof-of-concept exploit exists, documented in a Medium article specifically demonstrating authenticated stored XSS in this module. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold a high-privileged (admin-level) account on the Online Book Store System - this is explicitly reflected in the CVSS 4.0 vector PR:H. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 4.8 reflects the constrained exploitability: PR:H requires the attacker to already hold high-privileged (admin) credentials before injecting a payload, and UI:P means a victim must passively load the affected page for the script to execute. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has obtained or compromised an administrative account authenticates to the Online Book Store System and navigates to the User Management Module, injecting a JavaScript payload (e.g., a cookie-stealing script) into the Name or Username field when creating or editing a user record. When another authenticated user - such as a staff member or another admin - subsequently loads the user management interface, their browser silently executes the injected script, potentially exfiltrating their session token to an attacker-controlled server. … |
| Remediation | No vendor-released patch or security advisory has been identified for SourceCodester Online Book Store System 1.0 at the time of this analysis - the references link only to VulDB reports and the product's homepage, not to any official fix. … 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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