LiveActive security incident?Get immediate response
CVE Record

CVE-2021-4244: yikes-inc-easy-mailchimp-extender Plugin add_field_to_form.php cross site scripting

A vulnerability classified as problematic has been found in yikes-inc-easy-mailchimp-extender Plugin up to 6.8.5. This affects an unknown part of the file admin/partials/ajax/add_field_to_form.php. The manipulation of the argument field_name/merge_tag/field_type/list_id leads to cross site scripting. It is possible to initiate the attack remotely. Upgrading to version 6.8.6 is able to address this issue. The name of the patch is 3662c6593aa1bb4286781214891d26de2e947695. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-215307.

LowCVSS 2.6Not KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2021-4244 is a low-severity cross-site scripting issue in yikes-inc-easy-mailchimp-extender Plugin versions 6.8.0 through 6.8.5. An attacker with low privileges and user interaction could cause limited integrity impact. The available sources identify version 6.8.6 as the fix.

Executive priority

Treat this as routine patching unless the plugin is exposed in a sensitive WordPress administration workflow. The business risk is limited, but unpatched XSS can still affect trust and administrative integrity.

Technical view

The issue affects admin/partials/ajax/add_field_to_form.php. Manipulation of field_name, merge_tag, field_type, or list_id can lead to cross-site scripting. CVSS 3.1 is 2.6 with network access, high attack complexity, low privileges, required user interaction, unchanged scope, no confidentiality or availability impact, and low integrity impact.

Likely exposure

Exposure is likely limited to WordPress environments running yikes-inc-easy-mailchimp-extender Plugin versions 6.8.0 through 6.8.5. The source bundle does not provide CPEs or broader product naming beyond this plugin.

Exploitation context

The sources describe remote attack possibility, but the CVSS vector requires low privileges and user interaction. The CVE is not listed as KEV, and the provided sources do not state active exploitation.

Researcher notes

Evidence identifies parameter-driven XSS in add_field_to_form.php and a specific fixing commit. The source bundle does not include proof-of-concept details, active exploitation evidence, CPEs, or detailed exploit prerequisites beyond the CVSS vector.

Mitigation direction

  • Upgrade yikes-inc-easy-mailchimp-extender Plugin to version 6.8.6 or later.
  • Confirm the installed plugin version across all WordPress sites.
  • Review the 6.8.6 release and patch reference for vendor context.
  • Follow vendor guidance if later advisories supersede version 6.8.6.

Validation and detection

  • Inventory WordPress sites for the affected plugin and versions 6.8.0 through 6.8.5.
  • Verify production and staging instances report version 6.8.6 or later.
  • Review logs for unusual access to admin/partials/ajax/add_field_to_form.php.
  • Confirm vulnerability tracking records mark CVE-2021-4244 as remediated after upgrade.
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 · low confidence lookup

CWE-707: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-4244 mapping review

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

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Low
CVSS
2.6 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/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
5Source 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
2.6CVSS 3.1LowCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N1.21.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

2.6Low
CVSS 3.1 vector shape for CVE-2021-4244Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/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
unspecifiedyikes-inc-easy-mailchimp-extender Plugin6.8.0, 6.8.1, 6.8.2, 6.8.3, 6.8.4, 6.8.5Listed
Weakness

CWE details

CWE-707

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