CVE-2011-4320

The mod_pubsub module (mod_pubsub.erl) in ejabberd 2.1.8 and 3.0.0-alpha-3 allows remote authenticated users to cause a denial of service (infinite loop) via a stanza with a publish tag that lacks a node attribute.

Published: 2012-02-18 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-4320 is rated Moderate Risk (44.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.11%). Review affected assets and schedule 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-2011-4320

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 2026-06-15 1.18% 2.11% +0.93%
2 2025-03-30 1.49% 1.18% -0.31%
3 2025-03-29 — 1.49% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-4320

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.0 2.0 MEDIUM
AV:N/AC:L/Au:S/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:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 2.9 [email protected]

Weakness enumeration for CVE-2011-4320

GitHub Security Advisory for CVE-2011-4320

GHSA-2h3q-v47h-f4rc · Severity: medium · Ecosystem: erlang — Ejabberd DoS via malformed stanza

OS Trackers for CVE-2011-4320

vendor priority summary link
debian low CVE-2011-4320 low priority: Debian including 1 source packages (ejabberd), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2011-4320
gentoo normal CVE-2011-4320: 1 GLSA(s) (201206-10), 1 atom(s) (net-im/ejabberd); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-4320
ubuntu low CVE-2011-4320 low priority: Ubuntu including 1 source packages (ejabberd), 10 status rows across 10 suites (hardy, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, upstream): ignored 5, not-affected 4, released 1. https://ubuntu.com/security/CVE-2011-4320

Affected software / configurations for CVE-2011-4320

Vendor Product Version Raw CPE
process-one ejabberd 2.1.8 cpe:2.3:a:process-one:ejabberd:2.1.8:*:*:*:*:*:*:*
process-one ejabberd 3.0.0 cpe:2.3:a:process-one:ejabberd:3.0.0:alpha3:*:*:*:*:*:*

References for CVE-2011-4320

cvelogic Threat Intelligence