CVE-2021-25063Public exploitNetwork attack vector

Administrator script execution via unescaped tab parameter

Published Feb 1, 2022 · Updated Aug 3, 2024

Reflected XSS in CF7 Skins for Contact Form 7 before 2.5.1 allows remote attackers to run script in an administrator's browser. The admin page writes the tab query parameter into its HTML response without sanitization or context-appropriate output escaping. Exploitation requires Contact Form 7 to be installed and an administrator to open a crafted wp-admin URL; script execution remains within that browser session.

CVSS severity6.1
Medium
EPSS probability2.08%
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 CF7 Skins for Contact Form 7 before 2.5.1 allows remote attackers to run script in an administrator's browser. The admin page writes the tab query parameter into its HTML response without sanitization or context-appropriate output escaping. Exploitation requires Contact Form 7 to be installed and an administrator to open a crafted wp-admin URL; script execution remains within that browser session.

The record

CVE
CVE-2021-25063
Published
Feb 1, 2022
Updated
Aug 3, 2024
Vendor
CF7 Skins
Product
CF7 Skins for Contact Form 7
Classifications
CWE-79, T1566.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 1, 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=2.5.1 <2.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CF7 Skins · CF7 Skins for Contact Form 7version=2.5.1 <2.5.1

Published CVSS scores

6.1WordfenceCVSS: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')
T1566.002Spearphishing Link

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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