Is CVE-2015-3440 in the CISA KEV catalog?

No. CVE-2015-3440 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-3440?

CVE-2015-3440 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2015-3440?

CVE-2015-3440 has an EPSS score of 17.95% (97th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2015-3440

MEDIUMEPSS 97th pctl

4.3

CVSS v2

NVD

Description

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.

CWE-79Cross-Site Scripting (XSS)

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

17.95%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

http://codex.wordpress.org/Version_4.2.1
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/157391.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158271.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158278.html
http://osvdb.org/show/osvdb/121320
http://packetstormsecurity.com/files/131644/WordPress-4.2-Cross-Site-Scripting.html
http://seclists.org/fulldisclosure/2015/Apr/84
http://www.debian.org/security/2015/dsa-3250
http://www.securityfocus.com/bid/74334
http://www.securitytracker.com/id/1032199
https://core.trac.wordpress.org/changeset/32299
https://klikki.fi/adv/wordpress2.html
https://wordpress.org/news/2015/04/wordpress-4-2-1/
https://wpvulndb.com/vulnerabilities/7945
https://www.exploit-db.com/exploits/36844/

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.