CVE-2021-24953Public exploitNetwork attack vector

Administrator browser script execution via unescaped configuration ID

Published Mar 7, 2022 · Updated Aug 3, 2024

Reflected XSS in TinyWebGallery Advanced iFrame before 2022 allows remote attackers to execute script in an administrator's browser. The plugin's advanced-iframe.php administration page returns the POST ai_config_id value in HTML without sanitization or output escaping. Exploitation requires a logged-in administrator to load attacker-controlled content that submits the crafted form, and the injected script runs in the WordPress origin.

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 TinyWebGallery Advanced iFrame before 2022 allows remote attackers to execute script in an administrator's browser. The plugin's advanced-iframe.php administration page returns the POST ai_config_id value in HTML without sanitization or output escaping. Exploitation requires a logged-in administrator to load attacker-controlled content that submits the crafted form, and the injected script runs in the WordPress origin.

The record

CVE
CVE-2021-24953
Published
Mar 7, 2022
Updated
Aug 3, 2024
Vendor
TinyWebGallery
Product
Advanced iFrame
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 7, 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=2022 <2022

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TinyWebGallery · Advanced iFrameversion=2022 <2022

Published CVSS scores

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.

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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')
T1204.001User Execution: Malicious 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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