7.5

CVE-2018-8034: apache software foundation apache tomcat Improper Certificate Validation

Modified
AliasesUBUNTU-CVE-2018-8034DLA-1453-1GHSA-46j3-r4pj-4835
Published 01-08-2018Last modified 21-10-2024

Vulnerability summary

CVE-2018-8034 is a high (CVSS 7.5) Improper Certificate Validation vulnerability in apache software foundation apache tomcat. EPSS estimates a 21.05% chance of exploitation in the next 30 days, higher than 97.5% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 21% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
21.05%
0%100%
High · -0.25 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 17 · Related 7
DLA-1491-1DSA-4281-1MGASA-2018-0479OPENSUSE-SU-2024:11468-1OPENSUSE-SU-2024:13441-1RHSA-2019:0131

Timeline

  1. 01-08-2018
    PublishedVulnerability first disclosed.
  2. 21-10-2024
    Last modifiedVulnerability information updated.

Description

The host name verification when using TLS with the WebSocket client was missing. It is now enabled by default. Versions Affected: Apache Tomcat 9.0.0.M1 to 9.0.9, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.52, and 7.0.35 to 7.0.88.

CVSS metrics

7 scores · 4 sources · 3 versions

EPSS trend

Probability

21.05%

Chance of exploitation in the next 30 days

Percentile

98%

Versus all other CVEs

30-day change

Decrease -0.25 pp

From 21.30% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Debian2 products
Ubuntu2 products
  • tomcat7< 7.0.52-1ubuntu0.15 | All versions (No fix recorded)
  • tomcat8< 8.0.32-1ubuntu1.7 | < 8.5.39-1ubuntu1~18.04.1
Apache1 product
  • tomcatEOL≥ 7.0.35, ≤ 7.0.88 | ≥ 8.0.0, ≤ 8.0.52 | ≥ 8.5.0, ≤ 8.5.31 | ≥ 9.0.1, ≤ 9.0.9 | 8.0.0:rc1 | 8.0.0:rc10 | 8.0.0:rc2 | 8.0.0:rc3 | 8.0.0:rc4 | 8.0.0:rc5 | 8.0.0:rc6 | 8.0.0:rc7 | 8.0.0:rc8 | 8.0.0:rc9 | 9.0.0:milestone1 | 9.0.0:milestone10 | 9.0.0:milestone11 | 9.0.0:milestone12 | 9.0.0:milestone13 | 9.0.0:milestone14 | 9.0.0:milestone15 | 9.0.0:milestone16 | 9.0.0:milestone17 | 9.0.0:milestone18 | 9.0.0:milestone19 | 9.0.0:milestone2 | 9.0.0:milestone20 | 9.0.0:milestone21 | 9.0.0:milestone22 | 9.0.0:milestone23 | 9.0.0:milestone24 | 9.0.0:milestone25 | 9.0.0:milestone26 | 9.0.0:milestone27 | 9.0.0:milestone3 | 9.0.0:milestone4 | 9.0.0:milestone5 | 9.0.0:milestone6 | 9.0.0:milestone7 | 9.0.0:milestone8 | 9.0.0:milestone9
Apache software foundation1 product
  • apache tomcat9.0.0.M1 to 9.0.9 | 8.5.0 to 8.5.31 | 8.0.0.RC1 to 8.0.52 | 7.0.35 to 7.0.88
Canonical1 product
Oracle1 product
Org.apache.tomcat.embed1 product
  • tomcat-embed-core≥ 9.0.0, < 9.0.10 | ≥ 8.5.0, < 8.5.32 | ≥ 8.0.0, < 8.0.53 | ≥ 7.0.35, < 7.0.90

7 vendors · 9 products

References

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