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CVE-2021-39341: The OptinMonster WordPress plugin is vulnerable to sensitive information disclosure and unauthorized setting updates due to insufficient authorization validation via the logged_in_or_has_api_key funct

high Affects optinmonster (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published ; advisory modified .

The OptinMonster WordPress plugin is vulnerable to sensitive information disclosure and unauthorized setting updates due to insufficient authorization validation via the logged_in_or_has_api_key funct

Package
optinmonster (WordPress plugin) WordPress
Affected versions
<=2.6.4
Fixed in
no fix recorded
Severity
high  CVSS 8.2
Exploitation
not on CISA KEV · EPSS 22% (97.6th percentile)
Published
2021-11-01
Source
nvd

References

CWE-285CWE-319CWE-863
NVD recordoptinmonster (WordPress plugin) advisories

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