CVE-2018-5776 — WordPress before 4

WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js/mediaelement).

01What is this vulnerability?

WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js/mediaelement).

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-01-18T22:00:00.000Z
• Last modified: 2024-08-05T05:40:51.355Z

09References

• wordpress.org — https://wordpress.org/news/2018/01/wordpress-4-9-2-security-and-maintenance-rele…
• wpvulndb.com — https://wpvulndb.com/vulnerabilities/9006
• github.com — https://github.com/WordPress/WordPress/commit/3fe9cb61ee71fcfadb5e002399296fcc11…
• codex.wordpress.org — https://codex.wordpress.org/Version_4.9.2