CVE-2020-262878.7HighCWE-79

CVE-2020-26287: Stored XSS in mermaid diagrams

hedgedoc

Affected: hedgedoc · Exploitation: possible (1 to 10%)

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

1.5%probability of exploitation in the next 30 days

74th percentile

050100

Higher than 74% of scored CVEs

8.7HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

HedgeDoc is a collaborative platform for writing and sharing markdown. In HedgeDoc before version 1.7.1 an attacker can inject arbitrary `script` tags in HedgeDoc notes using mermaid diagrams. Our content security policy prevents loading scripts from most locations, but `www.google-analytics.com` is allowed. Using Google Tag Manger it is possible to inject arbitrary JavaScript and execute it on page load. Depending on the configuration of the instance, the attacker may not need authentication to create or edit notes. The problem is patched in HedgeDoc 1.7.1. As a workaround one can disallow `www.google-analytics.com` in the `Content-Security-Policy` header. Note that other ways to leverage the `script` tag injection might exist.

Affected products1

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

hedgedoc · hedgedoc< 1.7.1

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Cross-site Scripting
Vendor: hedgedoc
Published: December 2020
Band: Possible (1 to 10%), December 2020

CoverageNo articles yet

No CyberSIXT article names CVE-2020-26287 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.