---
id: "CVE-2026-38671"
kind: "vulnerability"
aliases: ["CVE-2026-38671"]
title: "Ellucian Banner Student Registration: XSS via mepCode parameter lets attackers run scripts"
severity: "medium"
cvss: 6.1
epss: null
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["ellucian-banner", "higher-education", "student-registration", "vendor", "web-app"]
not_affected_if: ["module-not-deployed"]
published_at: "2026-10-19T13:16:58+00:00"
first_seen_at: "2026-10-23T21:57:18+00:00"
updated_at: "2026-10-25T04:04:17+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-38671", "first_seen_at": "2026-10-23T21:57:18+00:00"}]
---

# Ellucian Banner Student Registration: XSS via mepCode parameter lets attackers run scripts

Ellucian Banner Student Registration Self-Service (StudentRegistrationSsb) 9.23 and earlier fails to sanitize the mepCode parameter on the /ssb/registration endpoint, enabling cross-site scripting. A remote attacker can get a victim's browser to run script in the context of the Banner session, which can expose student data or actions taken as that user.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Banner Student Registration Self-Service version against `9.23` and earlier, using the vendor's admin or release documentation
- Test whether the `/ssb/registration` endpoint reflects the `mepCode` parameter unescaped, for example with a harmless marker in a request to a non-production instance

## Fix

- No fixed version is listed in the sources (unknown); contact Ellucian support for a patch or mitigation
- Until a fix exists, restrict or filter the `mepCode` parameter at a web application firewall or reverse proxy

## Timeline

- 2026-10-23T21:57:18+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-38671

## From the sources

Cross Site Scripting vulnerability in Ellucian Banner Student Registration Self-Service (StudentRegistrationSsb) 9.23 and prior (no fixed version available) allows a remote attacker to execute arbitrary code via the mepCode parameter of the /ssb/registration endpoint

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_