CVE-2021-36843Network attack vector

Administrator-level stored XSS via configuration form

Published Nov 26, 2021 · Updated Apr 28, 2026

Stored XSS in Acurax Technologies Floating Social Media Icon 4.3.5 and earlier allows remote authenticated users to inject browser scripts. The public record identifies the Social Media Configuration form as the injection locus but does not disclose the affected field or deficient input-neutralization operation. Administrator-level access and a later viewing of the stored configuration are required, bounding the consequence to script execution in the viewer's browser.

CVSS severity4.8
Medium
EPSS probability0.56%
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 Acurax Technologies Floating Social Media Icon 4.3.5 and earlier allows remote authenticated users to inject browser scripts. The public record identifies the Social Media Configuration form as the injection locus but does not disclose the affected field or deficient input-neutralization operation. Administrator-level access and a later viewing of the stored configuration are required, bounding the consequence to script execution in the viewer's browser.

The record

CVE
CVE-2021-36843
Published
Nov 26, 2021
Updated
Apr 28, 2026
Vendor
Acurax Technologies
Product
Floating Social Media Icon
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record 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?

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

  1. Affected versionversion=<= 4.3.5 <=4.3.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Acurax Technologies · Floating Social Media Iconversion=<= 4.3.5 <=4.3.5

Published CVSS scores

3.5INCIBE-CERTAV:N/AC:M/Au:S/C:N/I:P/A:N
4.8INCIBE-CERTCVSS:3.1/AV:N/AC:L/PR:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

No public exploit references are available in this record.

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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