CVE-2021-22878: fedoraproject fedora Cross-site Scripting
CVSS: 4.8v3.1MediumModified
Published 03-03-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-22878 is a medium (CVSS 4.8) Cross-site Scripting vulnerability in fedoraproject fedora. EPSS estimates a 1.06% chance of exploitation in the next 30 days, higher than 63.9% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
4.8/10
010
Medium · v3.1 (NVD)EPSS score
1.06%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 03-03-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
Nextcloud Server prior to 20.0.6 is vulnerable to reflected cross-site scripting (XSS) due to lack of sanitization in `OC.Notification.show`.
CVSS metrics
2 scores · 1 source · 2 versionsMedium 4.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:NSourcesSingle source
Low 3.5Preferred score · NVD (NIST)
AV:N/AC:M/Au:S/C:N/I:P/A:NSourcesSingle source
EPSS trend
Probability
1.06%
Chance of exploitation in the next 30 days
Percentile
64%
Versus all other CVEs
30-day change
0.00 pp
From 1.06% on 18-09-2026
18-09-202618-10-2026
EPSS score1.06%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (hackerone.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Fedoraproject1 product
- fedoraEOL34
Nextcloud1 product
- nextcloud_server< 20.0.6
2 vendors · 2 products