CVE-2021-25012Public exploitNetwork attack vector

Reflected XSS via unescaped cache-manager parameters

Published Mar 28, 2022 · Updated Aug 3, 2024

Reflected XSS in Popozure Pz-LinkCard 2.4.4.4 and earlier allows remote attackers to execute scripts via crafted admin-page URLs. The cache-management handlers reflect the keyword and extraction query parameters into tools.php output without sanitization or context-appropriate escaping. Exploitation requires a logged-in administrator to open a crafted dashboard URL, after which attacker-controlled script runs in that administrator's browser.

CVSS severity6.1
Medium
EPSS probability0.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Popozure Pz-LinkCard 2.4.4.4 and earlier allows remote attackers to execute scripts via crafted admin-page URLs. The cache-management handlers reflect the keyword and extraction query parameters into tools.php output without sanitization or context-appropriate escaping. Exploitation requires a logged-in administrator to open a crafted dashboard URL, after which attacker-controlled script runs in that administrator's browser.

The record

CVE
CVE-2021-25012
Published
Mar 28, 2022
Updated
Aug 3, 2024
Vendor
Popozure
Product
Pz-LinkCard
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 28, 2022CVE 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=2.4.4.4 <=2.4.4.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Popozure · Pz-LinkCardversion=2.4.4.4 <=2.4.4.4

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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 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')
T1203Exploitation for Client Execution

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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