CVE-2021-25058Public exploitNetwork attack vector

Stored script execution via unescaped Twitter mention

Published Feb 21, 2022 · Updated Aug 3, 2024

Stored XSS in Igloo The Buffer Button 1.0 and earlier allows remote authenticated users to execute script via a Twitter mention value. The plugin stores the Twitter username-to-mention setting and inserts it into generated button markup without neutralizing HTML or script syntax. An authenticated account that can change the plugin setting is required, and execution occurs when a user loads output containing the saved value.

CVSS severity5.4
Medium
EPSS probability0.60%
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 Igloo The Buffer Button 1.0 and earlier allows remote authenticated users to execute script via a Twitter mention value. The plugin stores the Twitter username-to-mention setting and inserts it into generated button markup without neutralizing HTML or script syntax. An authenticated account that can change the plugin setting is required, and execution occurs when a user loads output containing the saved value.

The record

CVE
CVE-2021-25058
Published
Feb 21, 2022
Updated
Aug 3, 2024
Vendor
Igloo
Product
The Buffer Button
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 21, 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 <=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Igloo · The Buffer Buttonversion=1.0 <=1.0

Published CVSS scores

5.4NISTCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NISTAV: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 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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