CVE-2021-22878

Nextcloud Server prior to 20.0.6 is vulnerable to reflected cross-site scripting (XSS) due to lack of sanitization in `OC.Notification.show`.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
4.8 MEDIUM
NETWORK
LOW
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
hackeroneCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 57%
VendorProductVersion
nextcloudnextcloud_server
𝑥
< 20.0.6
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/nextcloud/server/pull/25234
https://hackerone.com/reports/896522
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/
https://nextcloud.com/security/advisory/?id=NC-SA-2021-005
https://github.com/nextcloud/server/pull/25234
https://hackerone.com/reports/896522
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/
https://nextcloud.com/security/advisory/?id=NC-SA-2021-005