phpwarden
FeaturesComparePricingAdvisoriesBlogDocsChangelogLog in
Log inStart free

CVE-2023-5098: The Campaign Monitor Forms by Optin Cat WordPress plugin before 2.5.6 does not prevent users with low privileges (like subscribers) from overwriting any options on a site with the string "true", which

high Affects campaign-monitor-optin-cat (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published ; advisory modified .

The Campaign Monitor Forms by Optin Cat WordPress plugin before 2.5.6 does not prevent users with low privileges (like subscribers) from overwriting any options on a site with the string "true", which

Package
campaign-monitor-optin-cat (WordPress plugin) WordPress
Affected versions
<2.5.6
Fixed in
2.5.6
Severity
high  CVSS 8.1
Exploitation
not on CISA KEV · EPSS 1% (54.1th percentile)
Published
2023-10-31
Source
nvd

References

NVD recordcampaign-monitor-optin-cat (WordPress plugin) advisories

Am I affected?

Find out in one command. phpwarden checks your WordPress install against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# one-time install
pip install phpwarden

# then
phpwarden wordpress /var/www/html

Or keep it checked automatically with the GitHub Action or a nightly cron; see WordPress docs.

Install docs   How findings are ranked

Related advisories