CVE-2026-57813
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedIncorrect Privilege Assignment vulnerability in properfraction MailOptin mailoptin allows Privilege Escalation.This issue affects MailOptin: from n/a through <= 1.2.77.3.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceThis is a privilege escalation vulnerability in the MailOptin WordPress plugin where improper privilege assignment allows users to gain elevated access beyond their intended authorization level. The issue affects all versions up to and including 1.2.77.3, likely enabling lower-privileged users to perform administrative actions they should not have access to.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify MailOptin plugin is installedAccess WordPress admin dashboard and navigate to Plugins > Installed Plugins, or inspect the /wp-content/plugins/ directory for the mailoptin folderAffected if MailOptin plugin is present in the WordPress installation
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Determine installed MailOptin versionIn WordPress admin, go to Plugins > Installed Plugins and find the version number listed under MailOptin, or check the main plugin file for the 'Version' header commentAffected if Version is 1.2.77.3 or lower (any version up to and including 1.2.77.3)
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Check for user registration enabledNavigate to WordPress Settings > General and verify if the 'Membership' setting allows anyone to register, or inspect the 'users_can_register' option in wp_options tableAffected if User registration is enabled with Subscriber, Contributor, or Author roles available to new users
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Review existing user roles and capabilitiesUse a user role editor plugin or query wp_usermeta and wp_capabilities tables to inspect role assignments for low-privileged accountsAffected if Lower-privileged users (Subscriber, Contributor, Author) exist alongside the vulnerable MailOptin version
Your environment is affected if MailOptin plugin is installed with any version up to and including 1.2.77.3 and your site permits user registration or has non-administrator accounts present.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade MailOptin to the latest version immediately to remediate this critical privilege escalation vulnerability. Until patched, restrict user registration and monitor admin accounts for suspicious activity.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,888.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-57813 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-57813 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data