CVE-2021-27129Public exploitNetwork attack vector

Stored script execution via unsanitized ROUTE field

Published Apr 15, 2021 · Updated Nov 11, 2025

Stored XSS in CASAP Automated Enrollment System 1.0 allows remote authenticated users to run scripts via the ROUTE field. The student update workflow stores the ROUTE value and renders it without neutralizing HTML or script content when the record is reloaded. Access to Students > Edit and a subsequent page view are required, exposing the viewer's session-accessible data and actions to the injected script.

CVSS severity5.4
Medium
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in CASAP Automated Enrollment System 1.0 allows remote authenticated users to run scripts via the ROUTE field. The student update workflow stores the ROUTE value and renders it without neutralizing HTML or script content when the record is reloaded. Access to Students > Edit and a subsequent page view are required, exposing the viewer's session-accessible data and actions to the injected script.

The record

CVE
CVE-2021-27129
Published
Apr 15, 2021
Updated
Nov 11, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 2021CVE publishedPublication date reported by the CVE source.
  2. Nov 11, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4StrixCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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