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Vulnerability Details :

CVE-2021-26540

Summary
Assigner-mitre
Assigner Org ID-8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At-08 Feb, 2021 | 16:16
Updated At-03 Aug, 2024 | 20:26
Rejected At-
Credits

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".

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:mitre
Assigner Org ID:8254265b-2729-46b6-b9e3-3dfca2d5bfca
Published At:08 Feb, 2021 | 16:16
Updated At:03 Aug, 2024 | 20:26
Rejected At:
▼CVE Numbering Authority (CNA)

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".

Affected Products
Vendor
n/a
Product
n/a
Versions
Affected
  • n/a
Problem Types
TypeCWE IDDescription
textN/An/a
Type: text
CWE ID: N/A
Description: n/a
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26
x_refsource_MISC
https://github.com/apostrophecms/sanitize-html/pull/460
x_refsource_MISC
https://advisory.checkmarx.net/advisory/CX-2021-4309
x_refsource_MISC
Hyperlink: https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26
Resource:
x_refsource_MISC
Hyperlink: https://github.com/apostrophecms/sanitize-html/pull/460
Resource:
x_refsource_MISC
Hyperlink: https://advisory.checkmarx.net/advisory/CX-2021-4309
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26
x_refsource_MISC
x_transferred
https://github.com/apostrophecms/sanitize-html/pull/460
x_refsource_MISC
x_transferred
https://advisory.checkmarx.net/advisory/CX-2021-4309
x_refsource_MISC
x_transferred
Hyperlink: https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://github.com/apostrophecms/sanitize-html/pull/460
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://advisory.checkmarx.net/advisory/CX-2021-4309
Resource:
x_refsource_MISC
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:cve@mitre.org
Published At:08 Feb, 2021 | 17:15
Updated At:01 Apr, 2021 | 15:02

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".

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Primary2.05.0MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N
Type: Primary
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Type: Primary
Version: 2.0
Base score: 5.0
Base severity: MEDIUM
Vector:
AV:N/AC:L/Au:N/C:N/I:P/A:N
CPE Matches
apostrophecms
apostrophecms
>>sanitize-html>>Versions before 2.3.2(exclusive)
cpe:2.3:a:apostrophecms:sanitize-html:*:*:*:*:*:node.js:*:*
Weaknesses
CWE IDTypeSource
NVD-CWE-noinfoPrimarynvd@nist.gov
CWE ID: NVD-CWE-noinfo
Type: Primary
Source: nvd@nist.gov
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://advisory.checkmarx.net/advisory/CX-2021-4309cve@mitre.org
Exploit
Patch
Third Party Advisory
https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26cve@mitre.org
Release Notes
Third Party Advisory
https://github.com/apostrophecms/sanitize-html/pull/460cve@mitre.org
Patch
Third Party Advisory
Hyperlink: https://advisory.checkmarx.net/advisory/CX-2021-4309
Source: cve@mitre.org
Resource:
Exploit
Patch
Third Party Advisory
Hyperlink: https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26
Source: cve@mitre.org
Resource:
Release Notes
Third Party Advisory
Hyperlink: https://github.com/apostrophecms/sanitize-html/pull/460
Source: cve@mitre.org
Resource:
Patch
Third Party Advisory

Change History

0
Information is not available yet

Similar CVEs

1Records found
CVE-2021-26539
Matching Score-8
Assigner-MITRE Corporation
ShareView Details
Matching Score-8
Assigner-MITRE Corporation
CVSS Score-5.3||MEDIUM
EPSS-0.29% / 51.86%
||
7 Day CHG~0.00%
Published-08 Feb, 2021 | 16:16
Updated-03 Aug, 2024 | 20:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

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.

Action-Not Available
Vendor-apostrophecmsn/a
Product-sanitize-htmln/a
Details not found