WordPress third-party support
WordPress 5.3
WordPress 5.3
Third-party support for the WordPress 5.3: 24/7 engineers manage issues, remediate vulnerabilities, and help you maintain compliance — independent of the vendor contract.
Issue Management
24/7 engineers own your WordPress 5.3 incidents end to end.
Vulnerability Remediation
Mitigation and patch-around guidance when the vendor no longer ships fixes.
Compliance Maintenance
Controls evidence and documentation that keep auditors satisfied.
Specifications
- product
- wordpress
- release
- 5.3
- product Label
- WordPress
- release Label
- 5.3
- codename
- lts
- latest Version
- 5.3.27
- release Date
- 2019-11-12
- maintained
- true
- source Url
- https://endoflife.date/wordpress
Lifecycle Dates
- Last OEM Support
- Mar 31, 2020
OEM vs. 3rd Party Support
See how third-party support compares to the vendor contract for WordPress 5.3 — monitoring, break/fix, vulnerability work, operations and compliance, before and after EOSL.
| Feature | OEM Support | 3rd Party Support |
|---|---|---|
| Post-EOSL Support | ||
| Break/Fix Support | Until EOSL | |
| 24/7 Monitoring | ||
| Vulnerability Scanning & Remediation | ||
| Managed Operations | ||
| Procedure & Configuration Review | ||
| Compliance & Audit Documentation | Limited | |
| Discounted Migration to Other Platforms |
Why Choose 3rd Party Support for WordPress 5.3?
Vulnerability Remediation
Scanning, mitigation and patch-around guidance for WordPress 5.3 when the vendor no longer ships fixes.
Compliance Maintenance
Procedure review, controls evidence and the documentation auditors ask for — maintained continuously, not scrambled at audit time.
24/7 Expert Support
Engineers who know this release monitor, manage and fix issues around the clock — break/fix to managed operations.
WordPress 5.3 Support: Frequently Asked Questions
Is the WordPress 5.3 still supported?
Yes. The WordPress 5.3 is currently supported by WordPress, and third-party support is available as an alternative — issue management, vulnerability remediation, and compliance help independent of the vendor contract.
How much does third-party support for the WordPress 5.3 cost?
Typically 40-70% below the OEM maintenance renewal price. Exact pricing depends on quantity, service level and location. You get an indicative price within 24 hours and a firm quote within 48.
Known Vulnerabilities Affecting WordPress 5.3
54 published CVEs affect the WordPress 5.3, including 19 rated critical or high severity. Our 24/7 engineers help you assess exposure, prioritize fixes and apply available patches.
| CVE | Severity | CVSS | Published | Summary |
|---|---|---|---|---|
| CVE-2020-36326 | CRITICAL | 9.8 | Apr 28, 2021 | PHPMailer 6.1.8 through 6.4.0 allows object injection through Phar Deserialization via addAttachment with a UNC pathname. NOTE: this is similar to CVE-2018-19296, but arose because 6.1.8 fixed a functionality problem in which UNC pathnames were always considered unreadable by PHPMailer, even in safe contexts. As an unintended side effect, this fix eliminated the code that blocked addAttachment exploitation. |
| CVE-2020-28037 | CRITICAL | 9.8 | Nov 2, 2020 | is_blog_installed in wp-includes/functions.php in WordPress before 5.5.2 improperly determines whether WordPress is already installed, which might allow an attacker to perform a new installation, leading to remote code execution (as well as a denial of service for the old installation). |
| CVE-2020-28036 | CRITICAL | 9.8 | Nov 2, 2020 | wp-includes/class-wp-xmlrpc-server.php in WordPress before 5.5.2 allows attackers to gain privileges by using XML-RPC to comment on a post. |
| CVE-2020-28035 | CRITICAL | 9.8 | Nov 2, 2020 | WordPress before 5.5.2 allows attackers to gain privileges via XML-RPC. |
| CVE-2020-28032 | CRITICAL | 9.8 | Nov 2, 2020 | WordPress before 5.5.2 mishandles deserialization requests in wp-includes/Requests/Utility/FilteredIterator.php. |
| CVE-2019-20041 | CRITICAL | 9.8 | Dec 27, 2019 | wp_kses_bad_protocol in wp-includes/kses.php in WordPress before 5.3.1 mishandles the HTML5 colon named entity, allowing attackers to bypass input sanitization, as demonstrated by the javascript: substring. |
| CVE-2020-28039 | CRITICAL | 9.1 | Nov 2, 2020 | is_protected_meta in wp-includes/meta.php in WordPress before 5.5.2 allows arbitrary file deletion because it does not properly determine whether a meta key is considered protected. |
| CVE-2018-19296 | HIGH | 8.8 | Nov 16, 2018 | PHPMailer before 5.2.27 and 6.x before 6.0.6 is vulnerable to an object injection attack. |
| CVE-2020-11026 | HIGH | 8.7 | Apr 30, 2020 | In affected versions of WordPress, files with a specially crafted name when uploaded to the Media section can lead to script execution upon accessing the file. This requires an authenticated user with privileges to upload files. This has been patched in version 5.4.1, along with all the previously affected versions via a minor release (5.3.3, 5.2.6, 5.1.5, 5.0.9, 4.9.14, 4.8.13, 4.7.17, 4.6.18, 4.5.21, 4.4.22, 4.3.23, 4.2.27, 4.1.30, 4.0.30, 3.9.31, 3.8.33, 3.7.33). |
| CVE-2026-119977 | HIGH | 8.1 | Oct 31, 2026 | WordPress Core is vulnerable to Remote Code Execution in versions 4.7 through 7.1.3. This is due to predictable, web-accessible staging paths used during full-package core upgrades. This makes it possible for unauthenticated attackers to execute code on the server during the upgrade window. |
| CVE-2026-87902 | HIGH | 8.1 | Sep 22, 2026 | An unauthenticated attacker can make `get_page_template()` page-template resolution include a chosen readable local `.php` file outside the active theme directories. If relevant pre-conditions for both the server and the active theme are met, this can lead to RCE. |
| CVE-2021-44223 | HIGH | 8.1 | Nov 25, 2021 | WordPress before 5.8 lacks support for the Update URI plugin header. This makes it easier for remote attackers to execute arbitrary code via a supply-chain attack against WordPress installations that use any plugin for which the slug satisfies the naming constraints of the WordPress.org Plugin Directory but is not yet present in that directory. |
| CVE-2022-21662 | HIGH | 8.0 | Jan 6, 2022 | WordPress is a free and open-source content management system written in PHP and paired with a MariaDB database. Low-privileged authenticated users (like author) in WordPress core are able to execute JavaScript/perform stored XSS attack, which can affect high-privileged users. This has been patched in WordPress version 5.8.3. Older affected versions are also fixed via security release, that go back till 3.7.37. We strongly recommend that you keep auto-updates enabled. There are no known workarou |
| CVE-2022-21661 | HIGH | 8.0 | Jan 6, 2022 | WordPress is a free and open-source content management system written in PHP and paired with a MariaDB database. Due to improper sanitization in WP_Query, there can be cases where SQL injection is possible through plugins or themes that use it in a certain way. This has been patched in WordPress version 5.8.3. Older affected versions are also fixed via security release, that go back till 3.7.37. We strongly recommend that you keep auto-updates enabled. There are no known workarounds for this vul |
| CVE-2024-31210 | HIGH | 7.6 | Apr 4, 2024 | WordPress is an open publishing platform for the Web. It's possible for a file of a type other than a zip file to be submitted as a new plugin by an administrative user on the Plugins -> Add New -> Upload Plugin screen in WordPress. If FTP credentials are requested for installation (in order to move the file into place outside of the `uploads` directory) then the uploaded file remains temporary available in the Media Library despite it not being allowed. If the `DISALLOW_FILE_EDIT` constant is s |
| CVE-2021-39201 | HIGH | 7.6 | Sep 9, 2021 | WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. ### Impact The issue allows an authenticated but low-privileged user (like contributor/author) to execute XSS in the editor. This bypasses the restrictions imposed on users who do not have the permission to post `unfiltered_html`. ### Patches This has been patched in WordPress 5.8, and will be pushed to older versions via minor releases (automatic updates). It's strongly reco |
| CVE-2020-28033 | HIGH | 7.5 | Nov 2, 2020 | WordPress before 5.5.2 mishandles embeds from disabled sites on a multisite network, as demonstrated by allowing a spam embed. |
| CVE-2011-5216 | HIGH | 7.5 | Oct 25, 2012 | SQL injection vulnerability in ajax.php in SCORM Cloud For WordPress plugin before 1.0.7 for WordPress allows remote attackers to execute arbitrary SQL commands via the active parameter. NOTE: some of these details are obtained from third party information. |
| CVE-2022-21664 | HIGH | 7.4 | Jan 6, 2022 | WordPress is a free and open-source content management system written in PHP and paired with a MariaDB database. Due to lack of proper sanitization in one of the classes, there's potential for unintended SQL queries to be executed. This has been patched in WordPress version 5.8.3. Older affected versions are also fixed via security release, that go back till 4.1.34. We strongly recommend that you keep auto-updates enabled. There are no known workarounds for this issue. |
| CVE-2020-4047 | MEDIUM | 6.8 | Jun 12, 2020 | In affected versions of WordPress, authenticated users with upload permissions (like authors) are able to inject JavaScript into some media file attachment pages in a certain way. This can lead to script execution in the context of a higher privileged user when the file is viewed by them. This has been patched in version 5.4.2, along with all the previously affected versions via a minor release (5.3.4, 5.2.7, 5.1.6, 5.0.10, 4.9.15, 4.8.14, 4.7.18, 4.6.19, 4.5.22, 4.4.23, 4.3.24, 4.2.28, 4.1.31, |
Showing the 20 most severe of 54 known CVEs.
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