CVE-2016-4434

Tika vulnerability

CVSS

7.8

EPSS

3.4%

EPSS pct

88th

Exploited

No known

Apache Tika before 1.13 does not properly initialize the XML parser or choose handlers, which might allow remote attackers to conduct XML External Entity (XXE) attacks via vectors involving (1) spreadsheets in OOXML files and (2) XMP metadata in PDF and other file formats, a related issue to CVE-2016-2175.

Affected vendor

Apache

Affected product

Tika

CVSS vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness type (CWE)

CWE-611 — XML External Entity (XXE) Reference

Published

2017-09-30

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable with local access, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2016-4434

Confirm whether Apache Tika is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2016-4434.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2016-4434

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2016-4434 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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