What is CVE-2019-17670?

CVE-2019-17670 is a critical-severity vulnerability in WordPress, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.8/10. Published 2019-10-17.

How severe is CVE-2019-17670?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2019-17670 known to be exploited?

8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SSRF in WordPress

CVE-2019-17670

WordPress before 5.2.4 has a Server Side Request Forgery (SSRF) vulnerability because Windows paths are mishandled during certain validation of relative URLs.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2019-10-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.045 (91.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.045 · newest: 0.045 · change: 0.000

Affected products

WordPress
Debian Linux — versions 8.0, 9.0, 10.0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

Public proof-of-concept exploits

References

blog.wpscan.org/wordpress/security/release/2019/10/15/wordpress-524-security-re… (Third Party Advisory)
wordpress.org/news/2019/10/wordpress-5-2-4-security-release/ (Release Notes, Vendor Advisory)
core.trac.wordpress.org/changeset/46472 (Patch, Vendor Advisory)
github.com/WordPress/WordPress/commit/9db44754b9e4044690a6c32fd74b9d5fe26b07b2 (Patch, Third Party Advisory)
wpvulndb.com/vulnerabilities/9912 (Third Party Advisory)
lists.debian.org/debian-lts-announce/2019/11/msg00000.html (mailing-list, Mailing List, Third Party Advisory)
lists.debian.org/debian-lts-announce/2020/09/msg00011.html (mailing-list, Mailing List, Third Party Advisory)
lists.debian.org/debian-lts-announce/2022/10/msg00010.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2019-17670?: CVE-2019-17670 is a critical-severity vulnerability in WordPress, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.8/10. Published 2019-10-17.
How severe is CVE-2019-17670?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2019-17670 known to be exploited?: 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.