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GHSA-9j5w-2cqc-cwj9

HighCVSS 7.5 / 10

Published Dec 8, 2023·Last modified Dec 4, 2024

Affected Components(0)

No affected components available

Description

From HackerOne report #1948040 by Halit AKAYDIN (hltakydn)

Impact

What kind of vulnerability is it? Who is impacted?

The TinyMCE WYSIWYG editor fails to filter scripts when rendering the HTML in specially crafted HTML tags.

Patches

Has the problem been patched? What versions should users upgrade to?

This vulnerability was fixed in version 20.2.0 by upgrading TinyMCE to a recent version in https://github.com/OpenMage/magento-lts/pull/3220

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

The WYSIWYG editor features could be disabled in the configuration. Possibly some WAF appliances would filter this attack.

References

Are there any links users can visit to find out more?

The attack is simply an exploit of the "onmouseover" attribute of an img element as described on OWASP XSS Filter Evasion

Risk Scores

Base Score

7.5

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs high-level or administrative privileges. The attacker needs the user to perform some action, like clicking a link. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information. There is a low impact on the integrity of the data. There is a low impact on the availability of the system.

Threat Intelligence

6.9

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS

N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit

Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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High severity

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