What is CVE-2013-4334?

CVE-2013-4334 is a critical-severity vulnerability in Opwebapiplugin, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.8/10. Published 2020-02-07.

How severe is CVE-2013-4334?

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

XXE in Opwebapiplugin

CVE-2013-4334

opWebAPIPlugin 0.5.1, 0.4.0, and 0.1.0: XXE Vulnerabilities

Vulnerability class: XXE (XML External Entity)

Published 2020-02-07 · last modified 2026-06-16.

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: 0.014 (70.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Opwebapiplugin — versions 0.5.1, 0.4.0.1, 0.1.0 (Fixed: 0.5.1.1
Tejimaya Opwebapiplugin — versions 0.1.0, 0.4.0, 0.5.1

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

www.openwall.com/lists/oss-security/2013/09/11/6 (Mailing List, Third Party Advisory)
www.openpne.jp/archives/12091/ (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2013-4334?: CVE-2013-4334 is a critical-severity vulnerability in Opwebapiplugin, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 9.8/10. Published 2020-02-07.
How severe is CVE-2013-4334?: Critical severity. CVSS v3 base score is 9.8 out of 10.