CVE-2021-26540 - CVE House
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Status published Medium CVE-2021-26540

Apostrophe Technologies sanitize-html before 2.3.2 does not properly validate the...

Vulnerability Description

Apostrophe Technologies sanitize-html before 2.3.2 does not properly validate the hostnames set by the "allowedIframeHostnames" option when the "allowIframeRelativeUrls" is set to true, which allows attackers to bypass hostname whitelist for iframe element, related using an src value that starts with "/\\example.com".

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from apostrophecms

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Apostrophe Technologies sanitize-html before 2.3.1 does not properly handle internationalized...
Medium 5.3
CVE-2019-25225
`sanitize-html` prior to version 2.0.0-beta is vulnerable to Cross-site Scripting...
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CVE-2016-1000237
sanitize-html before 1.4.3 has XSS....
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CVE-2014-125128
'sanitize-html' prior to version 1.0.3 is vulnerable to Cross-site Scripting...
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Affected Vendor

apostrophecms

View all reports →

Affected Software

sanitize-html
Vulnerable Versions:
0

Timeline

Official Publish: February 8th, 2021
Last Modified: August 3rd, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.