ROBOTSTXT/robotstxt-smtp-amazonses
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robotstxt-smtp-amazonses/docs/audit-pre-deploy-2.1.6.md
Javier Casares c2ead8e434 v2.1.6
2026-06-09 12:56:08 +00:00

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Pre-Deploy AI Audit — v2.1.6

Plugin slug: robotstxt-smtp-amazonses
Version: 2.1.6
Minimum PHP: 8.2
Minimum WP: 5.7
Architecture: Single-class OOP, namespace Robotstxt_SMTP_AmazonSES
Exposes: AJAX-style admin-post handlers, Settings API filter, WP-Cron hook
Target: Private / commercial

Audit scope: Full diff from 5ee811d (initial tooling commit) to HEAD — covers all changes introduced in this session.

1. SECURITY

1.1 handle_clear_credential() — new in 2.1.6

  • File: includes/class-plugin.php:1793
  • Nonce: wp_verify_nonce() with GET input via wp_unslash(). ✓
  • Capability: current_user_can('manage_options') / manage_network_options based on scope. ✓
  • Scope validation: sanitize_key(wp_unslash($scope_raw)) before comparison. ✓
  • Redirect: wp_safe_redirect(add_query_arg([...], admin_url('admin.php'))) — both $page_slug and $cleared_key are hardcoded literals, not from user input. ✓
  • Option update: uses update_option() / update_site_option() (WordPress API). ✓
  • ABSPATH guard: present in main file. ✓

1.2 display_clear_key_notice() — new in 2.1.6

  • File: includes/class-plugin.php:1861
  • FILTER_UNSAFE_RAW used to read robotstxt_smtp_amazonses_cleared. Value is checked with strict equality ('access_key' / 'secret_key') before any output. Output escaped with esc_html(). No XSS path. ✓
  • Notice only rendered when get_current_screen()->id contains 'robotstxt-smtp'. ✓

1.3 Credential validation change (2.1.5)

  • File: includes/class-plugin.php:1473–1537
  • Blocking only on InvalidClientTokenId, SignatureDoesNotMatch, InvalidAccessKeyId — correct. AWS authentication errors that definitively prove wrong credentials.
  • All other AwsException errors (wrong region, missing IAM permission) and Throwable errors (network) now allow saving. unset($exception) used to satisfy PHPCS empty-catch requirement. ✓
  • No sensitive data exposed in error messages — access key masked in debug context. ✓

1.4 Reply-to clearing (2.1.5)

  • File: includes/class-plugin.php:1269
  • sanitize_email(trim($options['reply_to_email'])) before setting to empty. ✓
  • Only acts when key reply_to_email exists in submitted $options. ✓

1.5 Dependency check / missing parent notice (2.1.5)

  • File: robotstxt-smtp-amazonses.php:82
  • Pure output using esc_html__(). No user input read. ✓
  • Registered on admin_notices and network_admin_notices only when parent class is absent. ✓

1.6 Previously existing code — no regressions found

  • All form field renders use esc_attr() / esc_html_e(). ✓
  • wp_nonce_field() / check_admin_referer() not needed here (Settings API handles nonces for save; admin-post handlers use wp_verify_nonce()). ✓
  • No eval(), base64_decode(), system(), exec(), unserialize(), extract(). ✓
  • Direct file access prevention on all PHP files. ✓

2. ROBUSTNESS & FATAL ERRORS

  • handle_clear_credential() sets $this->clearing_field before add_filter() and unconditionally clears it after update_option(). If update_option() fails (returns false, does not throw), the priority-11 filter is still removed. No filter leak risk. ✓
  • force_clear_credential() only acts when $this->clearing_field !== null. Safe to call even if left registered by accident. ✓
  • All new code requires PHP 8.2 (?string property type). Declared minimum matches. ✓
  • plugin_loaded → dependency check → class file included → run(): no class can be called before it's required. ✓
  • load_plugin_textdomain() registered on init from main file (not from class), so it fires even when parent plugin is absent and the notice needs translating. ✓

3. COMPATIBILITY & CONFLICTS

  • Multisite: both get_site_option() / update_site_option() and get_option() / update_option() paths implemented. is_network_admin() used for scope detection in field render, mirroring the parent plugin's password-clear pattern. ✓
  • No assumptions about sidebars, widgets, or block themes. ✓
  • Requires Plugins: robotstxt-smtp header enforced by WP 6.5+; PHP-level fallback added for WP 5.7–6.4. ✓

4. WORDPRESS CODING STANDARDS

  • All new functions prefixed with robotstxt_smtp_amazonses_. ✓
  • All new methods documented with @since 2.1.6. ✓
  • No logic in constructor. ✓
  • PHPCS passes with zero errors. ✓

5. INTERNATIONALIZATION

  • load_plugin_textdomain() on init. ✓
  • .pot regenerated with wp i18n make-pot (WP-CLI 2.12.0). ✓
  • es_ES and ca translations complete: all new strings translated, fuzzy entries resolved. ✓
  • Textdomain literal string 'robotstxt-smtp-amazonses' — no variables. ✓

6. PERFORMANCE

  • No N+1 queries introduced. ✓
  • delete_site_transient(get_quota_cache_key()) called after credential clear — avoids stale quota display. ✓
  • $client_cache keyed by md5(access_key|secret_key|region) — SES clients re-used within a request. ✓
  • All new admin-post handlers exit early on scope/nonce/capability failure before touching the DB. ✓

7. DATABASE & MIGRATIONS

  • No custom tables. All data in parent plugin's option. ✓
  • uninstall.php delegates to parent plugin. ✓

8. ASSETS & FRONTEND

  • No JS or CSS added. ✓
  • Clear buttons render as <a class="button button-secondary"> — standard WP admin styling, no inline script. ✓
  • esc_url(wp_nonce_url(...)) used for button href. ✓

9. DEVOPS / RELEASE ARTIFACTS

  • Version consistent across plugin header, ROBOTSTXT_SMTP_AMAZONSES_VERSION, readme.txt, update.json. ✓
  • Stable tag matches Version. ✓
  • changelog.txt and readme.txt follow template (date, categories, Compatibility, Tests). ✓
  • composer audit — no CVEs. ✓
  • bin/deploy.sh excludes dev files, phpstan config, composer.json/lock, .claude/, .git. ✓

10. PUBLIC API & BACKWARD COMPATIBILITY

  • New public methods: handle_clear_access_key(), handle_clear_secret_key(), force_clear_credential(), display_clear_key_notice(), get_cached_ses_quota(). All additive, no removals. ✓
  • get_quota_cache_key() remains public static — parent plugin accesses it. ✓
  • No changes to filter/action signatures. ✓
  • Removed: apply_ses_quota_to_rate_limits() — was unused private method. ✓

WARNINGS

  • [WARNING] RESOLVED includes/class-plugin.php:1873 — FILTER_UNSAFE_RAW changed to FILTER_SANITIZE_SPECIAL_CHARS + sanitize_key() for the robotstxt_smtp_amazonses_cleared query parameter.

FINAL EXECUTIVE SUMMARY

  1. Overall status: ✅ PASS
  2. Top mandatory fixes before tagging: None. All [CRITICAL] issues: 0.
  3. Estimated security risk: Low.
  4. Version recommendation: Safe to mark as stable.