CVE-2021-26540
Apostrophe Technologies Sanitize-html Iframe Bypass 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".
INFO
Published Date :
Feb. 8, 2021, 5:15 p.m.
Last Modified :
Nov. 21, 2024, 5:56 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-26540.
| URL | Resource |
|---|---|
| https://advisory.checkmarx.net/advisory/CX-2021-4309 | Exploit Patch Third Party Advisory |
| https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26 | Release Notes Third Party Advisory |
| https://github.com/apostrophecms/sanitize-html/pull/460 | Patch Third Party Advisory |
| https://advisory.checkmarx.net/advisory/CX-2021-4309 | Exploit Patch Third Party Advisory |
| https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26 | Release Notes Third Party Advisory |
| https://github.com/apostrophecms/sanitize-html/pull/460 | Patch Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-26540 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-26540 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://advisory.checkmarx.net/advisory/CX-2021-4309 Added Reference https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26 Added Reference https://github.com/apostrophecms/sanitize-html/pull/460 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Apr. 01, 2021
Action Type Old Value New Value Changed Reference Type https://advisory.checkmarx.net/advisory/CX-2021-4309 No Types Assigned https://advisory.checkmarx.net/advisory/CX-2021-4309 Exploit, Patch, Third Party Advisory -
CVE Modified by [email protected]
Mar. 25, 2021
Action Type Old Value New Value Added Reference https://advisory.checkmarx.net/advisory/CX-2021-4309 [No Types Assigned] -
Initial Analysis by [email protected]
Feb. 12, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Changed Reference Type https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26 No Types Assigned https://github.com/apostrophecms/sanitize-html/blob/main/CHANGELOG.md#232-2021-01-26 Release Notes, Third Party Advisory Changed Reference Type https://github.com/apostrophecms/sanitize-html/pull/460 No Types Assigned https://github.com/apostrophecms/sanitize-html/pull/460 Patch, Third Party Advisory Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:a:apostrophecms:sanitize-html:*:*:*:*:*:node.js:*:* versions up to (excluding) 2.3.2
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-26540 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-26540
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.29 }} -0.13%
score
0.49337
percentile