Cross-site scripting (XSS) vulnerability in wp-includes/wp-db.php in WordPress before 4.2.1 allows remote attackers to inject arbitrary web script or HTML via a long comment that is improperly stored because of limitations on the MySQL TEXT data type.
Conclusion & alert: CVE-2015-3440 is rated High Exploit Risk (69.6/100): CVSS Medium severity, with high exploitation likelihood (EPSS 17.87%, 97th percentile). Core evidence: 5 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +3.48% over the last day, indicating growing attacker interest. Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 36844 | exploit_db | edb | 2015-04-27 | Exploit-DB ↗ |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
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 | 14.39% | 17.87% | +3.48% |
| 2 | 2026-04-18 | 10.81% | 14.39% | +3.58% |
| 3 | 2026-03-04 | — | 10.81% | — |
Full EPSS history (48 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2015-3440 not yet assigned priority: Debian including 1 source packages (wordpress), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2015-3440 |
ubuntu
|
high | CVE-2015-3440 high priority: Ubuntu including 1 source packages (wordpress), 14 status rows across 14 suites (artful, bionic, cosmic, disco, lucid, precise, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): ignored 8, not-affected 4, DNE 1, released 1. | https://ubuntu.com/security/CVE-2015-3440 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| debian | debian_linux | 7.0 | cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* |
| debian | debian_linux | 8.0 | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
| wordpress | wordpress | <= 4.2 | cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:* |