CVE-2018-11761

In Apache Tika 0.1 to 1.18, the XML parsers were not configured to limit entity expansion. They were therefore vulnerable to an entity expansion vulnerability which can lead to a denial of service attack.

Published: 2018-09-19 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-11761 is rated High Risk (66.7/100): CVSS High severity, with high exploitation likelihood (EPSS 11.03%, 93th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +4.04% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-11761

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-29 6.98% 11.03% +4.04%
2 2026-01-17 9.95% 6.98% -2.96%
3 2025-11-21 — 9.95% —

Full EPSS history (26 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-11761

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-11761

GitHub Security Advisory for CVE-2018-11761

GHSA-6jq2-789q-fff2 · Severity: high · Ecosystem: maven — High severity vulnerability that affects org.apache.tika:tika-core

OS Trackers for CVE-2018-11761

vendor priority summary link
debian not yet assigned CVE-2018-11761 not yet assigned priority: Debian including 1 source packages (tika), 2 status rows across 2 suites (bullseye, sid): resolved 2. https://security-tracker.debian.org/tracker/CVE-2018-11761
redhat medium — https://access.redhat.com/security/cve/CVE-2018-11761
suse low — https://www.suse.com/security/cve/CVE-2018-11761/
ubuntu low CVE-2018-11761 low priority: Ubuntu including 1 source packages (tika), 19 status rows across 19 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 8, not-affected 6, needs-triage 4, DNE 1. https://ubuntu.com/security/CVE-2018-11761

Affected software / configurations for CVE-2018-11761

Vendor Product Version Raw CPE
apache tika >= 0.1, <= 1.18 cpe:2.3:a:apache:tika:*:*:*:*:*:*:*:*
oracle business_process_management_suite 12.1.3.0.0 cpe:2.3:a:oracle:business_process_management_suite:12.1.3.0.0:*:*:*:*:*:*:*
oracle business_process_management_suite 12.2.1.3.0 cpe:2.3:a:oracle:business_process_management_suite:12.2.1.3.0:*:*:*:*:*:*:*

References for CVE-2018-11761

cvelogic Threat Intelligence