CVE-2026-86244Public exploitNetwork attack vector

Cross-site scripting via unchecked redirect URL

Published Sep 7, 2026 · Updated Sep 8, 2026

Cross-site scripting in FastAdmin 1.2.0.20210401_beta allows remote attackers to execute script through the User Controller url parameter. The register and login methods in application/index/controller/User.php accept the request value and reuse it as a redirect target without restricting its scheme. No authentication is required, but a victim must follow the crafted request and complete the affected login or registration flow; successful exploitation alters browser-rendered content.

CVSS severity5.3
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in FastAdmin 1.2.0.20210401_beta allows remote attackers to execute script through the User Controller url parameter. The register and login methods in application/index/controller/User.php accept the request value and reuse it as a redirect target without restricting its scheme. No authentication is required, but a victim must follow the crafted request and complete the affected login or registration flow; successful exploitation alters browser-rendered content.

The record

CVE
CVE-2026-86244
Published
Sep 7, 2026
Updated
Sep 8, 2026
Vendor
FastAdmin
Product
FastAdmin
Classifications
CWE-79, CWE-94, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.2.0.20210401_beta

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FastAdmin · FastAdminversion=1.2.0.20210401_beta

Published CVSS scores

5.0VulDBAV:N/AC:L/Au:N/C:N/I:P/A:N
4.3VulDBCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
5.3VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
4.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-94Improper Control of Generation of Code ('Code Injection')
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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