CVE-2011-4905 [Medium] | Denial of Service in Activemq

CVE-2011-4905 is rated High Exploit Risk (71.9/100): CVSS Medium severity, with high exploitation likelihood (EPSS 8.98%, 95th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +3.83% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

EDB-ID	Source	Kind	Published	Link
—	nvd_ref	exploit_tag		Exploit-DB ↗

EDB-ID

Source

Kind

Published

Link

—

nvd_ref

exploit_tag

Exploit-DB ↗

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-16	5.16%	8.98%	+3.83%
2	2026-06-15	12.50%	5.16%	-7.35%
3	2026-02-09	—	12.50%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-16

5.16%

8.98%

+3.83%

2026-06-15

12.50%

5.16%

-7.35%

2026-02-09

—

12.50%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
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]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

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]

OS Trackers for CVE-2011-4905

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2011-4905 not yet assigned priority: Debian including 1 source packages (activemq), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): resolved 4.	https://security-tracker.debian.org/tracker/CVE-2011-4905
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2011-4905
`ubuntu`	medium	CVE-2011-4905 medium priority: Ubuntu including 1 source packages (activemq), 17 status rows across 17 suites (hardy, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): not-affected 9, DNE 5, ignored 2, released 1.	https://ubuntu.com/security/CVE-2011-4905

Affected software / configurations for CVE-2011-4905

Vendor	Product	Version	Raw CPE
apache	activemq	<= 5.5.1	cpe:2.3:a:apache:activemq::::::::
apache	activemq	1.1	cpe:2.3:a:apache:activemq:1.1:::::::*
apache	activemq	1.2	cpe:2.3:a:apache:activemq:1.2:::::::*
apache	activemq	1.3	cpe:2.3:a:apache:activemq:1.3:::::::*
apache	activemq	1.4	cpe:2.3:a:apache:activemq:1.4:::::::*
apache	activemq	1.5	cpe:2.3:a:apache:activemq:1.5:::::::*
apache	activemq	2.0	cpe:2.3:a:apache:activemq:2.0:::::::*
apache	activemq	2.1	cpe:2.3:a:apache:activemq:2.1:::::::*
apache	activemq	3.0	cpe:2.3:a:apache:activemq:3.0:::::::*
apache	activemq	3.1	cpe:2.3:a:apache:activemq:3.1:::::::*
apache	activemq	3.2	cpe:2.3:a:apache:activemq:3.2:::::::*
apache	activemq	3.2.1	cpe:2.3:a:apache:activemq:3.2.1:::::::*
apache	activemq	3.2.2	cpe:2.3:a:apache:activemq:3.2.2:::::::*
apache	activemq	4.0	cpe:2.3:a:apache:activemq:4.0:::::::*
apache	activemq	4.0	cpe:2.3:a:apache:activemq:4.0:m4::::::
apache	activemq	4.0	cpe:2.3:a:apache:activemq:4.0:rc2::::::
apache	activemq	4.0.1	cpe:2.3:a:apache:activemq:4.0.1:::::::*
apache	activemq	4.0.2	cpe:2.3:a:apache:activemq:4.0.2:::::::*
apache	activemq	4.1.0	cpe:2.3:a:apache:activemq:4.1.0:::::::*
apache	activemq	4.1.1	cpe:2.3:a:apache:activemq:4.1.1:::::::*
apache	activemq	4.1.2	cpe:2.3:a:apache:activemq:4.1.2:::::::*
apache	activemq	5.0.0	cpe:2.3:a:apache:activemq:5.0.0:::::::*
apache	activemq	5.1.0	cpe:2.3:a:apache:activemq:5.1.0:::::::*
apache	activemq	5.2.0	cpe:2.3:a:apache:activemq:5.2.0:::::::*
apache	activemq	5.3.0	cpe:2.3:a:apache:activemq:5.3.0:::::::*
apache	activemq	5.3.1	cpe:2.3:a:apache:activemq:5.3.1:::::::*
apache	activemq	5.3.2	cpe:2.3:a:apache:activemq:5.3.2:::::::*
apache	activemq	5.4.0	cpe:2.3:a:apache:activemq:5.4.0:::::::*
apache	activemq	5.4.1	cpe:2.3:a:apache:activemq:5.4.1:::::::*
apache	activemq	5.4.2	cpe:2.3:a:apache:activemq:5.4.2:::::::*
apache	activemq	5.4.3	cpe:2.3:a:apache:activemq:5.4.3:::::::*
apache	activemq	5.5.0	cpe:2.3:a:apache:activemq:5.5.0:::::::*

References for CVE-2011-4905

URL	Tags
http://openwall.com/lists/oss-security/2011/12/25/2
http://openwall.com/lists/oss-security/2011/12/25/6
http://secunia.com/advisories/47112	Vendor Advisory
http://svn.apache.org/viewvc?view=revision&revision=1209700
http://svn.apache.org/viewvc?view=revision&revision=1211844
http://www.securityfocus.com/bid/50904
https://issues.apache.org/jira/browse/AMQ-3294	Exploit

URL

CVE-2011-4905

Public exploit references (Exploit-DB) for CVE-2011-4905

Exploit prediction scoring system (EPSS) score for CVE-2011-4905

Common vulnerability scoring system (CVSS) metrics for CVE-2011-4905

Weakness enumeration for CVE-2011-4905

GitHub Security Advisory for CVE-2011-4905

OS Trackers for CVE-2011-4905

Affected software / configurations for CVE-2011-4905

References for CVE-2011-4905