CVE-2021-26087

Published Mar 17, 2025 CVSS 3.1 · 4.2 Medium EPSS < 1% KEV · Not listed

Description

An improper neutralization of input during web page generation in FortiWLC version 8.6.0, version 8.5.3 and below, version 8.4.8 and below, version 8.3.3 web interface may allow both authenticated remote attackers and non-authenticated attackers in the same network as the appliance to perform a stored cross site scripting attack (XSS) via injecting malicious payloads in different locations.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Fortinet

FortiWLC

unaffected

Version	Status	Constraints
`8.6.0`	affected	—
`8.5.0`	affected	≤ 8.5.3
`8.4.4`	affected	≤ 8.4.8
`8.4.0`	affected	≤ 8.4.2
`8.3.3`	affected	—

Configuration 1 [-]

OR	cpe:2.3:a:fortinet:fortiwlc::::::::
	cpe:2.3:a:fortinet:fortiwlc::::::::
	cpe:2.3:a:fortinet:fortiwlc:8.3.3:::::::*
	cpe:2.3:a:fortinet:fortiwlc:8.6.0:::::::*

No data.

No data available yet.

Remediation

Vendor Solution

Please upgrade to FortiWLC version 8.6.1 or above. Please upgrade to FortiWLC version 8.5.4 or above.

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2021-12908	An improper neutralization of input during web page generation in FortiWLC version 8.6.0, version 8.5.3 and below, version 8.4.8 and below, version 8.3.3 web interface may allow both authenticated remote attackers and non-authenticated attackers in the same network as the appliance to perform a stored cross site scripting attack (XSS) via injecting malicious payloads in different locations.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.335% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://fortiguard.fortinet.com/psirt/FG-IR-20-137

History

Jul 24, 2025 8:30 PM Affected versions updated View changes

Type	Values Removed	Values Added
CPEs		cpe:2.3:a:fortinet:fortiwlc::::::::

Mar 17, 2025 2:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Mar 17, 2025 1:30 PM Description updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		An improper neutralization of input during web page generation in FortiWLC version 8.6.0, version 8.5.3 and below, version 8.4.8 and below, version 8.3.3 web interface may allow both authenticated remote attackers and non-authenticated attackers in the same network as the appliance to perform a stored cross site scripting attack (XSS) via injecting malicious payloads in different locations.
First Time appeared		Fortinet Fortinet fortiwlc
Weaknesses		CWE-79
CPEs		cpe:2.3:a:fortinet:fortiwlc:8.3.3:::::::* cpe:2.3:a:fortinet:fortiwlc:8.4.0:::::::* cpe:2.3:a:fortinet:fortiwlc:8.4.1:::::::* cpe:2.3:a:fortinet:fortiwlc:8.4.2:::::::* cpe:2.3:a:fortinet:fortiwlc:8.4.4:::::::* cpe:2.3:a:fortinet:fortiwlc:8.4.5:::::::* cpe:2.3:a:fortinet:fortiwlc:8.4.6:::::::* cpe:2.3:a:fortinet:fortiwlc:8.4.7:::::::* cpe:2.3:a:fortinet:fortiwlc:8.4.8:::::::* cpe:2.3:a:fortinet:fortiwlc:8.5.0:::::::* cpe:2.3:a:fortinet:fortiwlc:8.5.1:::::::* cpe:2.3:a:fortinet:fortiwlc:8.5.2:::::::* cpe:2.3:a:fortinet:fortiwlc:8.5.3:::::::* cpe:2.3:a:fortinet:fortiwlc:8.6.0:::::::*
Vendors & Products		Fortinet Fortinet fortiwlc
References		https://fortiguard.fortinet.com/psirt/FG-IR-20-137
Metrics		cvssV3_1 `{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:F/RL:X/RC:X'}`