CVE-2021-24888Network attack vector

Stored XSS via unsanitized Source Name setting

Published Nov 23, 2021 · Updated Aug 3, 2024

Stored cross-site scripting in ImageBoss for WordPress before 3.0.6 allows remote authenticated users to execute script in another user's browser. The plugin stores the Source Name setting without sanitizing it and later renders the value without output escaping. Administrator-level access is required to save the payload, and a different user must load the affected administrative output for the script to execute.

CVSS severity4.8
Medium
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in ImageBoss for WordPress before 3.0.6 allows remote authenticated users to execute script in another user's browser. The plugin stores the Source Name setting without sanitizing it and later renders the value without output escaping. Administrator-level access is required to save the payload, and a different user must load the affected administrative output for the script to execute.

The record

CVE
CVE-2021-24888
Published
Nov 23, 2021
Updated
Aug 3, 2024
Vendor
ImageBoss
Product
ImageBoss
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 23, 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=3.0.6 <3.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

ImageBoss · ImageBossversion=3.0.6 <3.0.6

Published CVSS scores

4.8NVDCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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