Serendipity before 2.1.5 has XSS via EXIF data that is mishandled in the templates/2k11/admin/media_choose.tpl Editor Preview feature or the templates/2k11/admin/media_items.tpl Media Library feature.
Conclusion & alert: CVE-2019-11870 is rated Moderate Risk (46.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.43%). Mandatory action: Review affected assets and schedule remediation.
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 | 2025-09-01 | 0.52% | 0.43% | -0.08% |
| 2 | 2025-03-30 | 0.80% | 0.52% | -0.28% |
| 3 | 2025-03-29 | — | 0.80% | — |
Full EPSS history (9 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.1 | 3.0 | MEDIUM |
|
2.8 | 2.7 | [email protected] |
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
ubuntu
|
medium | CVE-2019-11870 medium priority: Ubuntu including 1 source packages (serendipity), 6 status rows across 6 suites (bionic, cosmic, disco, trusty, upstream, xenial): DNE 5, needs-triage 1. | https://ubuntu.com/security/CVE-2019-11870 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| s9y | serendipity | < 2.1.5 | cpe:2.3:a:s9y:serendipity:*:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://www.openwall.com/lists/oss-security/2019/05/10/1 | Mailing List Third Party Advisory |
| https://blog.s9y.org/archives/282-Serendipity-2.1.5-released.html | Release Notes Vendor Advisory |
| https://github.com/s9y/Serendipity/issues/598 | Third Party Advisory |
| https://www.openwall.com/lists/oss-security/2019/05/03/3 | Mailing List Third Party Advisory |