HIGH
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
Published May 22, 2016
7.4
HIGHCVSS 3.0
EPSS 4.45%
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.4 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality Impact None
Integrity Impact High
Availability Impact None
5.8 MEDIUM NVD
AV:N/AC:M/Au:N/C:P/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
4.45% 0.04446
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.04446
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (36 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.45% (0.04446) | 91.10th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.70% (0.04696) | 90.60th | v5 (v2026.06.15) |
| Mar 4, 2026 | 3.46% (0.03465) | 87.30th | v4 (v2025.03.14) |
| Mar 1, 2026 | 4.86% (0.04864) | 89.41th | v4 (v2025.03.14) |
| Feb 4, 2026 | 3.46% (0.03465) | 87.23th | v4 (v2025.03.14) |
| Feb 1, 2026 | 4.86% (0.04864) | 89.33th | v4 (v2025.03.14) |
| Jan 4, 2026 | 3.46% (0.03465) | 87.18th | v4 (v2025.03.14) |
| Jan 1, 2026 | 4.86% (0.04864) | 89.28th | v4 (v2025.03.14) |
| Dec 4, 2025 | 3.46% (0.03465) | 87.11th | v4 (v2025.03.14) |
| Dec 1, 2025 | 4.86% (0.04864) | 89.20th | v4 (v2025.03.14) |
| Nov 4, 2025 | 3.46% (0.03465) | 87.03th | v4 (v2025.03.14) |
| Nov 1, 2025 | 4.86% (0.04864) | 89.11th | v4 (v2025.03.14) |
| Oct 4, 2025 | 3.46% (0.03465) | 87.06th | v4 (v2025.03.14) |
| Oct 1, 2025 | 4.86% (0.04864) | 89.14th | v4 (v2025.03.14) |
| Sep 4, 2025 | 3.69% (0.03695) | 87.48th | v4 (v2025.03.14) |
| Sep 1, 2025 | 5.18% (0.05181) | 89.58th | v4 (v2025.03.14) |
| Aug 4, 2025 | 3.69% (0.03695) | 87.51th | v4 (v2025.03.14) |
| Aug 1, 2025 | 5.18% (0.05181) | 89.58th | v4 (v2025.03.14) |
| Jul 4, 2025 | 3.46% (0.03465) | 87.06th | v4 (v2025.03.14) |
| Jul 1, 2025 | 4.86% (0.04864) | 89.13th | v4 (v2025.03.14) |
| Jun 4, 2025 | 3.46% (0.03465) | 86.97th | v4 (v2025.03.14) |
| Jun 1, 2025 | 4.86% (0.04864) | 89.08th | v4 (v2025.03.14) |
| May 4, 2025 | 3.46% (0.03465) | 86.89th | v4 (v2025.03.14) |
| May 1, 2025 | 4.86% (0.04864) | 88.99th | v4 (v2025.03.14) |
| Mar 30, 2025 | 3.46% (0.03465) | 86.43th | v4 (v2025.03.14) |
| Mar 29, 2025 | 18.56% (0.18556) | 92.18th | v4 (v2025.03.14) |
| Mar 24, 2025 | 3.46% (0.03465) | 86.43th | v4 (v2025.03.14) |
| Mar 23, 2025 | 18.56% (0.18556) | 94.48th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.46% (0.03465) | 86.76th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.65% (0.00650) | 80.09th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.65% (0.00650) | 78.74th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.65% (0.00650) | 76.21th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
Weaknesses (0)
No CWE recorded.
References (7)
- http://www.debian.org/security/2016/dsa-3472 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/bid/82463 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1034933 vdb-entryx_refsource_SECTRACK
- https://codex.wordpress.org/Version_4.4.2 x_refsource_CONFIRMPatch
- https://core.trac.wordpress.org/changeset/36444 x_refsource_CONFIRMPatch
- https://wordpress.org/news/2016/02/wordpress-4-4-2-security-and-maintenance-release/ x_refsource_CONFIRMPatchVendor Advisory
- https://wpvulndb.com/vulnerabilities/8377 x_refsource_MISC
| Link | Providers | Tags |
|---|---|---|
| http://www.debian.org/security/2016/dsa-3472 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.securityfocus.com/bid/82463 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/id/1034933 | vdb-entryx_refsource_SECTRACK | |
| https://codex.wordpress.org/Version_4.4.2 | x_refsource_CONFIRMPatch | |
| https://core.trac.wordpress.org/changeset/36444 | x_refsource_CONFIRMPatch | |
| https://wordpress.org/news/2016/02/wordpress-4-4-2-security-and-maintenance-release/ | x_refsource_CONFIRMPatchVendor Advisory | |
| https://wpvulndb.com/vulnerabilities/8377 | x_refsource_MISC |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner debian
Published May 22, 2016
Updated Aug 5, 2024
Reserved Feb 4, 2016
Link CVE-2016-2221
CISA Vulnrichment
Updated n/a