CVE-2020-262375.8MediumCWE-471

CVE-2020-26237: Prototype Pollution in highlight.js

highlightjs · highlight.js

Affected: highlightjs highlight.js · Exploitation: possible (1 to 10%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

1.3%probability of exploitation in the next 30 days

71st percentile

050100

Higher than 71% of scored CVEs

5.8MediumCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

highlightjs · highlight.js< 9.18.2; >= 10.0.0, < 10.1.2

On the Atlas

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Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Modification of Assumed-Immutable Data (MAID) · Other weaknesses
Published: November 2020
Band: Possible (1 to 10%), November 2020

CoverageNo articles yet

No CyberSIXT article names CVE-2020-26237 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.