CVE-2024-29203Network attack vector

Cross-site scripting via unsandboxed iframe insertion

Published Mar 26, 2024 · Updated Aug 6, 2024

Cross-site scripting in Tiny Technologies TinyMCE before 6.8.1 allows remote attackers to execute iframe content through editor insertion. The content parser preserves inserted iframe elements without adding a sandbox attribute, so embedded resources execute within browser origin controls. Exploitation requires a user to process attacker-controlled content in an editor; same-origin protections limit the frame, but it can initiate malicious asset downloads.

CVSS severity4.3
Medium
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Tiny Technologies TinyMCE before 6.8.1 allows remote attackers to execute iframe content through editor insertion. The content parser preserves inserted iframe elements without adding a sandbox attribute, so embedded resources execute within browser origin controls. Exploitation requires a user to process attacker-controlled content in an editor; same-origin protections limit the frame, but it can initiate malicious asset downloads.

The record

CVE
CVE-2024-29203
Published
Mar 26, 2024
Updated
Aug 6, 2024
Vendor
Tiny Technologies
Product
TinyMCE
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 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=< 6.8.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Tiny Technologies · TinyMCEversion=< 6.8.1

Published CVSS scores

4.3GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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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