CVE-2026-34417
MEDIUM EPSS 6.5%
Published Jun 9, 20263w ago · Modified Jun 17, 20262w ago
5.1 CVSS 4.0
Published Jun 9, 2026 3w ago
Last Modified Jun 17, 2026 2w ago
Description
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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 Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction A
Scope X
Threat Intelligence
EPSS Exploit Probability
6.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-79 Cross-site Scripting Injection
References 2
- gist.github.com https://gist.github.com/cyberinforepo/5a8d369a005826b6b42bfeed9607c2dd
- vulncheck.com https://www.vulncheck.com/advisories/oscal-gui-reflected-xss-via-project-parameter-in-oscal-forms-php
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.