CVE-2021-4244 json
yikes-inc-easy-mailchimp-extender Plugin add_field_to_form.php cross site scripting
published 2022-12-12 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-7558 , GHSA-837v-6vgx-jqcc
- cvss
- 2.6
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist yikesinc/yikes-inc-easy-mailchimp-extender 6.8.6
- yikesplugins easy_forms_for_mailchimp 6.8.6
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 18 mo ago
Exploit prediction
0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 2.6 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N |
| GitHub | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | yikesinc/yikes-inc-easy-mailchimp-extender | <6.8.6 |
6.8.6 |
Affected products
- unspecified yikes-inc-easy-mailchimp-extender Plugin
Classification
- Weakness
- Technology feeds
References
-
github.com
/EvanHerman/yikes-inc-easy-mailchimp-extender/pull/889
web, patch, third-party-advisory
-
github.com
/EvanHerman/yikes-inc-easy-mailchimp-extender/commit/3662c6593aa1bb4286781214891d26de2e947695
web, patch, third-party-advisory
-
github.com
/EvanHerman/yikes-inc-easy-mailchimp-extender/releases/tag/6.8.6
web, release-notes, third-party-advisory
-
vuldb.com
/?id.215307
web, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-4244
advisory
-
github.com
/yikesinc/yikes-inc-easy-mailchimp-extender
package
Sources
- CVE List CVE-2021-4244
- GitHub Advisory GHSA-837v-6vgx-jqcc
- NVD CVE-2021-4244
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.