CVE-2020-26286
CVSS V2 Medium 5
CVSS V3 High 7.5
Description
HedgeDoc is a collaborative platform for writing and sharing markdown. In HedgeDoc before version 1.7.1 an unauthenticated attacker can upload arbitrary files to the upload storage backend including HTML, JS and PHP files. The problem is patched in HedgeDoc 1.7.1. You should however verify that your uploaded file storage only contains files that are allowed, as uploaded files might still be served. As workaround it's possible to block the `/uploadimage` endpoint on your instance using your reverse proxy. And/or restrict MIME-types and file names served from your upload file storage.
Overview
- CVE ID
- CVE-2020-26286
- Assigner
- security-advisories@github.com
- Vulnerability Status
- Analyzed
- Published Version
- 2020-12-29T00:15:12
- Last Modified Date
- 2020-12-30T16:14:55
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:hedgedoc:hedgedoc:*:*:*:*:*:*:*:* | 1 | OR | 1.7.1 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:N/I:P/A:N
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 5
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 7.5
- Base Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/hedgedoc/hedgedoc/commit/e9306991cdb5ff2752c1eeba3fedba42aec3c2d8 | Patch Third Party Advisory |
| https://github.com/hedgedoc/hedgedoc/releases/tag/1.7.1 | Third Party Advisory |
| https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-wcr3-xhv7-8gxc | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-26286 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26286 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:29:09 | Added to TrackCVE | |||
| 2022-12-05 18:56:07 | 2020-12-29T00:15Z | 2020-12-29T00:15:12 | CVE Published Date | updated |
| 2022-12-05 18:56:07 | 2020-12-30T16:14:55 | CVE Modified Date | updated | |
| 2022-12-05 18:56:07 | Analyzed | Vulnerability Status | updated |