CVE-2016-4812: Cross-site scripting (XSS) vulnerability in the Markdown on Save Improved plugin before 2.5.1 for WordPress allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

medium Affects markdown-on-save-improved (WordPress plugin). Feed 2026.10.29.1, updated 2026-10-28; published ; advisory modified .

Cross-site scripting (XSS) vulnerability in the Markdown on Save Improved plugin before 2.5.1 for WordPress allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

Package
markdown-on-save-improved (WordPress plugin) WordPress
Affected versions
<=2.5
Fixed in
no fix recorded
Severity
medium  CVSS 6.1
Exploitation
not on CISA KEV · EPSS 2% (74.4th percentile)
Published
2016-06-04
Source
nvd

References

CWE-79
NVD recordmarkdown-on-save-improved (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