Cross-site scripting (XSS) vulnerability in the activity application in ownCloud Server before 7.0.5 and 8.0.x before 8.0.4 allows remote authenticated users to inject arbitrary web script or HTML via a " (double quote) character in a filename in a shared folder.
Conclusion & alert: CVE-2015-5953 is rated Low Risk (33/100): CVSS Low severity, with medium exploitation likelihood (EPSS 0.83%). Mandatory action: Monitor for updates and reassess as exploit intelligence or EPSS changes.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.18% | 0.83% | +0.64% |
| 2 | 2025-03-17 | 0.07% | 0.18% | +0.12% |
| 3 | 2023-03-07 | — | 0.07% | — |
Full EPSS history (4 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 3.5 | 2.0 | LOW |
|
6.8 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
ubuntu
|
medium | CVE-2015-5953 medium priority: Ubuntu including 1 source packages (owncloud), 4 status rows across 4 suites (precise, trusty, upstream, vivid): DNE 2, not-affected 1, released 1. | https://ubuntu.com/security/CVE-2015-5953 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| owncloud | owncloud | <= 7.0.4 | cpe:2.3:a:owncloud:owncloud:*:*:*:*:*:*:*:* |
| owncloud | owncloud_server | 8.0.0 | cpe:2.3:a:owncloud:owncloud_server:8.0.0:*:*:*:*:*:*:* |
| owncloud | owncloud_server | 8.0.2 | cpe:2.3:a:owncloud:owncloud_server:8.0.2:*:*:*:*:*:*:* |
| owncloud | owncloud_server | 8.0.3 | cpe:2.3:a:owncloud:owncloud_server:8.0.3:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://www.debian.org/security/2015/dsa-3373 | |
| https://owncloud.org/security/advisory/?id=oc-sa-2015-010 | Vendor Advisory |