What is CVE-2023-43187?

CVE-2023-43187 is a critical-severity vulnerability in Nodebb, classified under XML Injection (Blind XPath Injection). CVSS score: 9.8/10. Published 2023-09-27.

How severe is CVE-2023-43187?

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

Is CVE-2023-43187 known to be exploited?

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

XPath Injection in Nodebb

CVE-2023-43187

A remote code execution (RCE) vulnerability in the xmlrpc.php endpoint of NodeBB Inc NodeBB forum software prior to v1.18.6 allows attackers to execute arbitrary code via crafted XML-RPC requests.

Published 2023-09-27 · 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: 0.469 (98.8th percentile), scored 2026-09-29.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.454 · newest: 0.469 · change: +0.015

Affected products

Nodebb

Weakness classification (CWE)

CWE-91 — XML Injection (Blind XPath Injection)

Public proof-of-concept exploits

jagat-singh-chaudhary/SUBDOMAIN-JAGAT

References

github.com/jagat-singh-chaudhary/CVE/blob/main/CVE-2023-43187 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-43187?: CVE-2023-43187 is a critical-severity vulnerability in Nodebb, classified under XML Injection (Blind XPath Injection). CVSS score: 9.8/10. Published 2023-09-27.
How severe is CVE-2023-43187?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-43187 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.