Is CVE-2021-26539 actively exploited?

CVE-2021-26539 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2021-26539?

CVE-2021-26539 has a CVSS score of 5.3 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

How do I patch CVE-2021-26539?

Patch guidance is available from apostrophecms security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-26539.

Which products are affected by CVE-2021-26539?

1 product: apostrophecms sanitize-html.

CVE-2021-26539 - remediation guidance & executive summary

Description

Apostrophe Technologies sanitize-html before 2.3.1 does not properly handle internationalized domain name (IDN) which could allow an attacker to bypass hostname whitelist validation set by the "allowedIframeHostnames" option.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: low
Availability: none
Weaknesses: NVD-CWE-noinfo

Metadata

Primary Vendor: APOSTROPHECMS
Published: 2/8/2021
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2021-26539

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary