8.7
CVE-2020-26287
- EPSS 0.55%
- Veröffentlicht 29.12.2020 00:15:12
- Zuletzt bearbeitet 21.11.2024 05:19:45
- Quelle security-advisories@github.com
- CVE-Watchlists
- Unerledigt
LoginHedgeDoc 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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.55% | 0.651 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| nvd@nist.gov | 8.7 | 2.3 | 5.8 |
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
|
| nvd@nist.gov | 4.3 | 8.6 | 2.9 |
AV:N/AC:M/Au:N/C:N/I:P/A:N
|
| security-advisories@github.com | 8.7 | 2.3 | 5.8 |
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
|
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.