What is CVE-2023-49967?

CVE-2023-49967 is a high-severity vulnerability in Typecho, classified under Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion). CVSS score: 7.5/10. Published 2023-12-07.

How severe is CVE-2023-49967?

High severity. CVSS v3 base score is 7.5 out of 10.

XXE in Typecho

CVE-2023-49967

Typecho v1.2.1 was discovered to be vulnerable to an XML Quadratic Blowup attack via the component /index.php/action/xmlrpc.

Published 2023-12-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (53.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Typecho — versions 1.2.1

Weakness classification (CWE)

CWE-776 — Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion)

References

github.com/typecho/typecho/issues/1648 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2023-49967?: CVE-2023-49967 is a high-severity vulnerability in Typecho, classified under Improper Restriction of Recursive Entity References in DTDs (XML Entity Expansion). CVSS score: 7.5/10. Published 2023-12-07.
How severe is CVE-2023-49967?: High severity. CVSS v3 base score is 7.5 out of 10.