CVE-2026-86244

FastAdmin User Controller User.php login cross site scripting

MEDIUM
4.3
CVSS Score
Published: September 7, 2026 at 01:30 AM UTC
Updated: September 28, 2026 at 11:10 PM UTC
1 product affected across 1 vendorFastadmin

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.5%
SSVC
PoC

Description

A security vulnerability has been detected in FastAdmin up to 1.2.0.20210401_beta. Affected is the function register/login of the file application/index/controller/User.php of the component User Controller. Such manipulation of the argument url leads to cross site scripting. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. Upgrading to version 1.2.1.20210731_beta is able to address this issue. The name of the patch is b3d32e2bf3637488cfe2fc58a27a9d2475b2b51b. It is recommended to upgrade the affected component.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vendor states this is fixed in 1.2.1.20210731_beta (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (6)

VDB EntryTechnical Description
Source: cverecord
https://vuldb.com/vuln/399399
SignaturePermissions Required
Source: cverecord
https://vuldb.com/vuln/399399/cti
Third Party Advisory
Source: cverecord
https://vuldb.com/cve/CVE-2026-86244
Third Party Advisory
Source: cverecord
https://vuldb.com/submit/898809

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-79CWE-94

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