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CVE-2016-2221
Open redirect vulnerability in the wp_validate_redirect function in wp-includes/pluggable.php in WordPress before 4.4.2 allows remote…
- 7.4HighCVSS base score
- 4.4%Exploitation in 30 daysEPSS · top 8.5% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Open redirect vulnerability in the wp_validate_redirect function in wp-includes/pluggable.php in WordPress before 4.4.2 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a malformed URL that triggers incorrect hostname parsing, as demonstrated by an https:example.com URL.
Timeline
ID reserved
By debian
- 4 months later
· 4 months later
Published
- 8 years later
· 8 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | High7.4 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 4.4% · top 8.5% of all CVEs (9 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.
Affected products
n/a
- affected n/a
References
7
- https://codex.wordpress.org/Version_4.4.2 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 1034933 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 82463 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://core.trac.wordpress.org/changeset/36444 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://wordpress.org/news/2016/02/wordpress-4-4-2-security-and-maintenance-release/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-3472 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://wpvulndb.com/vulnerabilities/8377 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2016-3305 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2016-2221)Record last updated .