CVE-2021-24597Network attack vector

Stored script execution via unescaped QR links

Published Sep 20, 2021 · Updated Aug 3, 2024

Stored XSS in Fens Liu 有赏 1.0.1 and earlier allows remote authenticated users to execute scripts in visitors' browsers. The plugin stores qrcode link settings without output escaping and renders the stored values in frontend posts or the settings page. An authenticated user must save a crafted setting and a victim must view an affected page before attacker-supplied JavaScript executes in the browser context.

CVSS severity5.4
Medium
EPSS probability0.62%
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 Fens Liu 有赏 1.0.1 and earlier allows remote authenticated users to execute scripts in visitors' browsers. The plugin stores qrcode link settings without output escaping and renders the stored values in frontend posts or the settings page. An authenticated user must save a crafted setting and a victim must view an affected page before attacker-supplied JavaScript executes in the browser context.

The record

CVE
CVE-2021-24597
Published
Sep 20, 2021
Updated
Aug 3, 2024
Vendor
Fens Liu
Product
有赏 You Shang
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=1.0.1 <=1.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Fens Liu · 有赏 You Shangversion=1.0.1 <=1.0.1

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/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 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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