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CVE Record

CVE-2026-1278: Mandatory Field <= 1.6.8 - Authenticated (Administrator+) Stored Cross-Site Scripting via Settings Fields

The Mandatory Field plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 1.6.8 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

MediumCVSS 4.4Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2026-1278 affects the WordPress Mandatory Field plugin through version 1.6.8. An administrator can save script content in plugin settings, causing it to run later in a user’s browser. Business urgency is limited by the need for administrator access and specific WordPress configurations, but it still matters on shared or multisite environments.

Executive priority

Treat as a targeted hygiene item, not an emergency. Address promptly where the plugin is used on multisite or delegated-admin WordPress environments. The main risk is malicious script execution after administrator-level access is already available.

Technical view

This is stored cross-site scripting in Mandatory Field admin settings caused by insufficient sanitization and output escaping. The CVSS 3.1 score is 4.4. Exploitation requires high privileges and applies only to multisite installations or installations where unfiltered_html is disabled. The issue maps to CWE-79.

Likely exposure

Exposure is likely limited to WordPress sites using the Mandatory Field plugin at version 1.6.8 or earlier, especially multisite deployments or sites where unfiltered_html is disabled. Sites without this plugin are not affected by this CVE.

Exploitation context

No active exploitation is indicated in the provided sources, and the CVE is not listed as KEV. The attacker must already have administrator-level access, so this is mainly a post-compromise, insider, or delegated-admin risk.

Researcher notes

The description states all versions up to and including 1.6.8 are affected, but the structured affected entry in the bundle is limited and unclear. No patch version is named in the provided sources. Validate against WordPress plugin repository and vendor guidance before closing remediation.

Mitigation direction

  • Inventory WordPress sites for the Mandatory Field plugin and installed version.
  • Prioritize multisite installations and sites where unfiltered_html is disabled.
  • Review the WordPress plugin page and vendor guidance for an updated release or remediation.
  • Limit administrator access to trusted users only.
  • Remove or disable the plugin if it is not required.

Validation and detection

  • Confirm whether Mandatory Field is installed on each WordPress site.
  • Check whether the installed version is 1.6.8 or earlier.
  • Identify whether the site is multisite or has unfiltered_html disabled.
  • Review plugin settings for unexpected script-like content.
  • Monitor vendor and Wordfence references for fix status updates.
Prepared
Confidence
high
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2026-1278 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.4 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.4CVSS 3.1MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N1.32.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.4Medium
CVSS 3.1 vector shape for CVE-2026-1278Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
ketanmujumdarMandatory Field0unaffected
Weakness

CWE details

CWE-79

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.