WordPress through 4.8.2 uses a weak MD5-based password hashing algorithm, which makes it easier for attackers to determine cleartext values by leveraging access to the hash values
Published Oct 19, 2017
7.5
HIGHCVSS 3.0
EPSS 1.11%
Description
WordPress through 4.8.2 uses a weak MD5-based password hashing algorithm, which makes it easier for attackers to determine cleartext values by leveraging access to the hash values. NOTE: the approach to changing this may not be fully compatible with certain use cases, such as migration of a WordPress site from a web host that uses a recent PHP version to a different web host that uses PHP 5.2. These use cases are plausible (but very unlikely) based on statistics showing widespread deployment of WordPress with obsolete PHP versions.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
AV:N/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
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 (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.11% (0.01109) | 64.65th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.11% (0.01109) | 61.49th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.19% (0.00191) | 38.04th | v4 (v2025.03.14) |
| Mar 29, 2025 | 14.04% (0.14040) | 90.59th | v4 (v2025.03.14) |
| Mar 24, 2025 | 0.19% (0.00191) | 38.08th | v4 (v2025.03.14) |
| Mar 23, 2025 | 1.59% (0.01588) | 77.92th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.19% (0.00191) | 38.90th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.21% (0.00207) | 59.63th | v3 (v2023.03.01) |
| Apr 25, 2024 | 0.15% (0.00150) | 50.56th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.14% (0.00145) | 49.35th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.14% (0.00135) | 47.55th | v3 (v2023.03.01) |
| May 8, 2023 | 0.17% (0.00168) | 52.28th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.13% (0.00131) | 46.20th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00885) | 26.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
References (1)
- https://core.trac.wordpress.org/ticket/21022 x_refsource_MISCIssue TrackingPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://core.trac.wordpress.org/ticket/21022 | x_refsource_MISCIssue TrackingPatchVendor Advisory |
Change history (0)
No recorded changes yet.