CVE-2020-8294
MEDIUM
5.4
CVSS Score
Published: February 3, 2021 at 04:42 PM UTC
Updated: June 17, 2026 at 03:26 AM UTC
1 product affected across 1 vendorNextcloud/server
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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.9%
Description
A missing link validation in Nextcloud Server before 20.0.2, 19.0.5, 18.0.11 allows execution of a stored XSS attack using Internet Explorer when saving a 'javascript:' URL in markdown format.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Nextcloud/server· Nextcloudnextcloud-app
95%v < 18.0.1119.0.0 ≤ v < 19.0.520.0.0 ≤ v < 20.0.2
Affected range stops below 18.0.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 19.0.5, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 20.0.2 (unaffected)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
x_refsource_CONFIRMPermissions RequiredThird Party Advisory
Source: [email protected]
https://hackerone.com/reports/1023787x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://nextcloud.com/security/advisory/?id=NC-SA-2021-002CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality
- LOW
- Integrity
- LOW
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-79
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