WP Post Author – Author Box, Multiple Authors, Guest Authors & Custom Avatars vulnerabilities
Plugin slug wp-post-author · 14 known vulnerabilities · latest disclosed 2026-10-27 · WordPress.org page
Every listed vulnerability has a fix. Version 4.2.0 or later is not affected by any of them. If your site runs an older version, update it.
2 of 14 rated high or critical (CVSS 7 or more).
Known vulnerabilities in WP Post Author – Author Box, Multiple Authors, Guest Authors & Custom Avatars
| Severity | Affected versions | Fixed in | CVE | Published | Details |
|---|---|---|---|---|---|
| Medium 5.3 | <= 4.1.0 | 4.2.0 | CVE-2026-108686 | 2026-10-27 | Advisory |
| Medium 5.3 | <= 4.1.0 | 4.2.0 | CVE-2026-108685 | 2026-10-27 | Advisory |
| Medium 4.9 | < 4.1.0 | 4.1.0 | CVE-2026-108124 | 2026-10-09 | Advisory |
| Medium 6.5 | 4.0.0 to 4.1.0 | 4.1.0 | CVE-2026-108125 | 2026-10-09 | Advisory |
| Medium 4.9 | <= 4.0.0 | 4.0.1 | CVE-2026-42708 | 2026-10-07 | Advisory |
| Medium 6.5 | <= 3.9.1 | 3.10.0 | CVE-2026-11977 | 2026-08-04 | Advisory |
| Medium 6.5 | <= 3.9.1 | 3.10.0 | CVE-2026-57643 | 2026-06-26 | Advisory |
| Medium 6.1 | <= 3.8.3 | 3.8.4 | CVE-2024-13362 | 2026-04-30 | Advisory |
| Medium 4.9 | <= 3.8.2 | 3.8.3 | CVE-2024-56247 | 2024-12-30 | Advisory |
| High 7.2 | <= 3.8.1 | 3.8.2 | CVE-2024-8757 | 2024-10-11 | Advisory |
| Medium 6.4 | <= 3.6.7 | 3.6.8 | CVE-2024-37101 | 2024-06-20 | Advisory |
| Medium 4.3 | <= 3.6.4 | 3.6.5 | CVE-2024-34387 | 2024-05-06 | Advisory |
| Medium 4.3 | <= 3.7.4 | 3.7.5 | CVE-2024-34389 | 2024-05-06 | Advisory |
| Critical 9.8 | <= 3.2.3 | 3.3.0 | none | 2023-06-28 | Advisory |
Check if a site is affected
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Questions
Is the WP Post Author – Author Box, Multiple Authors, Guest Authors & Custom Avatars plugin safe to use?
All 14 known issues are fixed in current versions (4.2.0 or later). Keeping it updated is what matters.
How do I check which version of WP Post Author – Author Box, Multiple Authors, Guest Authors & Custom Avatars my site runs?
In WordPress go to Plugins > Installed Plugins. From the outside, the free PluginPeek scan below reads the version from the site's public files.
How do I fix a vulnerable plugin?
Make a full backup, then update it from Dashboard > Updates and check the site afterwards. If you would rather not, we can do it for a fixed $99, paid after you have checked the site.