What is CVE-2016-9487?

CVE-2016-9487 is a high-severity vulnerability in Epubcheck, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.8/10. Published 2018-07-13.

How severe is CVE-2016-9487?

High severity. CVSS v3 base score is 7.8 out of 10.

XXE in Epubcheck

CVE-2016-9487

EpubCheck 4.0.1 does not properly restrict resolving external entities when parsing XML in EPUB files during validation. An attacker who supplies a specially crafted EPUB file may be able to exploit this behavior to read arbitrary files, or have the victim execute arbitrary requests on his behalf, abusing the victim's trust relationship with other entities.

Vulnerability class: XXE (XML External Entity)

EPSS: 0.013 (67.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Epubcheck — versions 4.0.1
W3 Epubcheck — versions 4.0.1

Weakness classification (CWE)

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

References

cret@cert.org (US Government Resource, x_refsource_CERT-VN, Third Party Advisory, third-party-advisory)
cret@cert.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)

Frequently asked questions

What is CVE-2016-9487?: CVE-2016-9487 is a high-severity vulnerability in Epubcheck, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.8/10. Published 2018-07-13.
How severe is CVE-2016-9487?: High severity. CVSS v3 base score is 7.8 out of 10.