EUVD-2026-35841
GHSA-79q4-fp7f-qmxh
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/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
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/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
2DescriptionNVD
OSCAL-GUI contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to execute arbitrary JavaScript in a victim's browser by injecting malicious content through the project request parameter in oscal-forms.php. The parameter value is URL-decoded and assigned to the project_id variable without sanitization in oscal-functions.php, and when the supplied project ID is not found, the unsanitized value is concatenated into an error message via the Messages() function and reflected into the HTML response body without encoding.
AnalysisAI
Reflected cross-site scripting in OSCAL-GUI allows unauthenticated remote attackers to execute arbitrary JavaScript in a victim's browser by injecting payloads through the unsanitized project parameter in oscal-forms.php. The parameter is URL-decoded and passed without sanitization into an error message via the Messages() function in oscal-functions.php, which is then reflected directly into the HTML response body when the supplied project ID does not match any existing record. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Active user interaction is mandatory - the CVSS UI:A metric confirms a victim must click or navigate to a crafted URL; passive or automated network-level exploitation is not possible. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 5.1 (Medium) accurately captures the real-world risk profile for this vulnerability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a URL targeting the publicly accessible `oscal-forms.php` endpoint with a `project` parameter containing a JavaScript payload - for example, a script that exfiltrates the victim's session cookie to an attacker-controlled server. The attacker delivers this URL to an OSCAL-GUI user via spear-phishing email; when the victim clicks the link, the application fails to locate the injected value as a valid project ID, reflects it unsanitized in an error message, and the payload executes in the victim's authenticated browser session. … |
| Remediation | No vendor-released patch has been identified at time of analysis; a fixed version is not confirmed from any available reference. … Detailed patch versions, workarounds, and compensating controls in full report. |
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