7.5

CVE-2025-27533: apache software foundation apache activemq

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2025-27533DEBIAN-CVE-2025-27533DLA-4222-1
Published 07-05-2025Last modified 03-11-2025
Open JSON

Vulnerability summary

CVE-2025-27533 is a high (CVSS 7.5) vulnerability in apache software foundation apache activemq. EPSS estimates a 8.96% chance of exploitation in the next 30 days, higher than 95.2% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
42/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
8.96%
0%100%
Low · +0.30 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1exploit-database

Advisory lineage

Upstream 0 · Downstream 0 · Related 2
CGA-3RR4-WMQ6-26JXCGA-7H42-X664-53J9

Timeline

  1. 07-05-2025
    PublishedVulnerability first disclosed.
  2. 03-11-2025
    Last modifiedVulnerability information updated.

Description

Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ. During unmarshalling of OpenWire commands the size value of buffers was not properly validated which could lead to excessive memory allocation and be exploited to cause a denial of service (DoS) by depleting process memory, thereby affecting applications and services that rely on the availability of the ActiveMQ broker when not using mutual TLS connections. This issue affects Apache ActiveMQ: from 6.0.0 before 6.1.6, from 5.18.0 before 5.18.7, from 5.17.0 before 5.17.7, before 5.16.8. ActiveMQ 5.19.0 is not affected. Users are recommended to upgrade to version 6.1.6+, 5.19.0+, 5.18.7+, 5.17.7, or 5.16.8 or which fixes the issue. Existing users may implement mutual TLS to mitigate the risk on affected brokers.

CVSS metrics

10 scores · 7 sources · 2 versions

EPSS trend

Probability

8.96%

Chance of exploitation in the next 30 days

Percentile

95%

Versus all other CVEs

30-day change

+0.30 pp

From 8.66% on 18-09-2026

18-09-202618-10-2026
EPSS score
8.96%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • exploit-databaseremotemultipleUnverified

    Apache ActiveMQ 6.1.6 - Denial of Service (DOS)

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Chainguard3 products
  • zipkin< 3.5.1-r1
  • zipkin-oci-entrypoint< 3.5.1-r1
  • zipkin-slim< 3.5.1-r1
Wolfi3 products
  • zipkin< 3.5.1-r1
  • zipkin-oci-entrypoint< 3.5.1-r1
  • zipkin-slim< 3.5.1-r1
Org.apache.activemq2 products
  • activemq-client< 5.16.8 | ≥ 5.17.0, < 5.17.7 | ≥ 5.18.0, < 5.18.7 | ≥ 6.0.0, < 6.1.6
  • activemq-openwire-legacy< 5.16.8 | ≥ 5.17.0, < 5.17.7 | ≥ 5.18.0, < 5.18.7 | ≥ 6.0.0, < 6.1.6
Apache1 product
  • activemq≥ 5.16.0, < 5.16.8 | ≥ 5.17.0, < 5.17.7 | ≥ 5.18.0, < 5.18.7 | ≥ 6.0.0, < 6.1.6
Apache software foundation1 product
  • apache activemq≥ 6.0.0, < 6.1.6 | ≥ 5.18.0, < 5.18.7 | ≥ 5.17.0, < 5.17.7 | ≥ 5.16.0, < 5.16.8
Debian1 product
  • activemqAll versions (No fix recorded) | < 5.17.6+dfsg-2 | < 5.16.1-1+deb11u2
Ubuntu1 product
  • activemqAll versions (No fix recorded)

7 vendors · 12 products

References

11 links
Show all 11 references