CVE-2021-25050Public exploitNetwork attack vector

Stored XSS via unsanitized footer replacement

Published Feb 14, 2022 · Updated Aug 3, 2024

Stored XSS in WPChill Remove Footer Credit before 1.0.11 allows remote authenticated users to execute JavaScript on site visitors. The plugin saves insufficiently sanitized replacement HTML from its settings fields and injects that value into matching page footers before rendering. Administrator-level access is required, and a visitor must load an affected page; successful exploitation runs the stored script in that visitor's browser even when unfiltered_html is disabled.

CVSS severity4.8
Medium
EPSS probability0.65%
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 WPChill Remove Footer Credit before 1.0.11 allows remote authenticated users to execute JavaScript on site visitors. The plugin saves insufficiently sanitized replacement HTML from its settings fields and injects that value into matching page footers before rendering. Administrator-level access is required, and a visitor must load an affected page; successful exploitation runs the stored script in that visitor's browser even when unfiltered_html is disabled.

The record

CVE
CVE-2021-25050
Published
Feb 14, 2022
Updated
Aug 3, 2024
Vendor
WPChill
Product
Remove Footer Credit
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 14, 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=1.0.11 <1.0.11

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

WPChill · Remove Footer Creditversion=1.0.11 <1.0.11

Published CVSS scores

4.8NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
3.5NVDAV: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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

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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