CVE-2020-26237
Highlight.js Prototype Pollution Vulnerability
Description
Highlight.js is a syntax highlighter written in JavaScript. Highlight.js versions before 9.18.2 and 10.1.2 are vulnerable to Prototype Pollution. A malicious HTML code block can be crafted that will result in prototype pollution of the base object's prototype during highlighting. If you allow users to insert custom HTML code blocks into your page/app via parsing Markdown code blocks (or similar) and do not filter the language names the user can provide you may be vulnerable. The pollution should just be harmless data but this can cause problems for applications not expecting these properties to exist and can result in strange behavior or application crashes, i.e. a potential DOS vector. If your website or application does not render user provided data it should be unaffected. Versions 9.18.2 and 10.1.2 and newer include fixes for this vulnerability. If you are using version 7 or 8 you are encouraged to upgrade to a newer release.
INFO
Published Date :
Nov. 24, 2020, 11:15 p.m.
Last Modified :
Oct. 19, 2022, 1:49 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.8
Exploitability Score :
2.3
Affected Products
The following products are affected by CVE-2020-26237
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
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-2020-26237.
| URL | Resource |
|---|---|
| https://github.com/highlightjs/highlight.js/commit/7241013ae011a585983e176ddc0489a7a52f6bb0 | Patch Third Party Advisory |
| https://github.com/highlightjs/highlight.js/pull/2636 | Patch Third Party Advisory |
| https://github.com/highlightjs/highlight.js/security/advisories/GHSA-vfrc-7r7c-w9mx | Mitigation Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2020/12/msg00041.html | Mailing List Third Party Advisory |
| https://www.npmjs.com/package/highlight.js | Third Party Advisory |
| https://www.oracle.com/security-alerts/cpujul2022.html | 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-2020-26237 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-26237 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.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Oct. 19, 2022
Action Type Old Value New Value Removed CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:H Changed Reference Type https://lists.debian.org/debian-lts-announce/2020/12/msg00041.html No Types Assigned https://lists.debian.org/debian-lts-announce/2020/12/msg00041.html Mailing List, Third Party Advisory Changed Reference Type https://www.oracle.com/security-alerts/cpujul2022.html No Types Assigned https://www.oracle.com/security-alerts/cpujul2022.html Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:oracle:mysql_enterprise_monitor:*:*:*:*:*:*:*:* versions up to (including) 8.0.30 -
CVE Modified by [email protected]
Jul. 25, 2022
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpujul2022.html [No Types Assigned] -
CVE Modified by [email protected]
Dec. 31, 2020
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2020/12/msg00041.html [No Types Assigned] -
Initial Analysis by [email protected]
Dec. 04, 2020
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:S/C:N/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:H/A:N Changed Reference Type https://github.com/highlightjs/highlight.js/commit/7241013ae011a585983e176ddc0489a7a52f6bb0 No Types Assigned https://github.com/highlightjs/highlight.js/commit/7241013ae011a585983e176ddc0489a7a52f6bb0 Patch, Third Party Advisory Changed Reference Type https://github.com/highlightjs/highlight.js/pull/2636 No Types Assigned https://github.com/highlightjs/highlight.js/pull/2636 Patch, Third Party Advisory Changed Reference Type https://github.com/highlightjs/highlight.js/security/advisories/GHSA-vfrc-7r7c-w9mx No Types Assigned https://github.com/highlightjs/highlight.js/security/advisories/GHSA-vfrc-7r7c-w9mx Mitigation, Third Party Advisory Changed Reference Type https://www.npmjs.com/package/highlight.js No Types Assigned https://www.npmjs.com/package/highlight.js Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:highlightjs:highlight.js:*:*:*:*:*:node.js:*:* versions up to (excluding) 9.18.2 *cpe:2.3:a:highlightjs:highlight.js:*:*:*:*:*:node.js:*:* versions from (including) 10.1.0 up to (excluding) 10.1.2 -
CVE Modified by [email protected]
Nov. 25, 2020
Action Type Old Value New Value Changed Description Highlight.js is a syntax highlighter written in JavaScript. Highlight.js versions before 9.18.2 and 10.1.2 are vulnerable to Prototype Pollution. A malicious HTML code block can be crafted that will result in prototype pollution of the base object's prototype during highlighting. If you allow users to insert custom HTML code blocks into your page/app via parsing Markdown code blocks (or similar) and do not filter the language names the user can provide you may be vulnerable. The pollution should just be harmless data but this can cause problems for applications not expecting these properties to exist and can result in strange behavior or application crashes, i.e. a potential DOS vector. If your website or application does not render user provided data it should be unaffected. Versions 9.18.2 and 10.1.2 and newer include fixes for this vulnerability. If you are using version 7 or 8 you are encouraged to upgrade to a newer release. Highlight.js is a syntax highlighter written in JavaScript. Highlight.js versions before 9.18.2 and 10.1.2 are vulnerable to Prototype Pollution. A malicious HTML code block can be crafted that will result in prototype pollution of the base object's prototype during highlighting. If you allow users to insert custom HTML code blocks into your page/app via parsing Markdown code blocks (or similar) and do not filter the language names the user can provide you may be vulnerable. The pollution should just be harmless data but this can cause problems for applications not expecting these properties to exist and can result in strange behavior or application crashes, i.e. a potential DOS vector. If your website or application does not render user provided data it should be unaffected. Versions 9.18.2 and 10.1.2 and newer include fixes for this vulnerability. If you are using version 7 or 8 you are encouraged to upgrade to a newer release.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-26237 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-2020-26237
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.34 }} 0.05%
score
0.68213
percentile