CVE-2011-1753

CVE-2011-1753 is a medium-severity vulnerability in Process-one Ejabberd with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

• Severity: Medium (CVSS 2.0 base score 5.0)
• EPSS exploit prediction: 2% (80th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-399
• Affected product: Process-one Ejabberd
• Published: 2011-06-21
• Last modified: 2026-06-16

Description

expat_erl.c in ejabberd before 2.1.7 and 3.x before 3.0.0-alpha-3, and exmpp before 0.9.7, does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of service (memory and CPU consumption) via a crafted XML document containing a large number of nested entity references, a similar issue to CVE-2003-1564.

Frequently asked questions

What is CVE-2011-1753?

expat_erl.c in ejabberd before 2.1.7 and 3.x before 3.0.0-alpha-3, and exmpp before 0.9.7, does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of service (memory and CPU consumption) via a crafted XML document containing a large number of nested entity references, a similar issue to CVE-2003-1564.

How severe is CVE-2011-1753?

CVE-2011-1753 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-1753 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1753?

CVE-2011-1753 primarily affects Process-one Ejabberd. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-1753?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-1753 published?

CVE-2011-1753 was published on 2011-06-21 and last updated on 2026-06-16.

References

• http://lists.fedoraproject.org/pipermail/package-announce/2011-June/062099.html
• http://lists.fedoraproject.org/pipermail/package-announce/2011-June/062145.html
• http://secunia.com/advisories/44765
• http://secunia.com/advisories/44807
• http://secunia.com/advisories/45120
• http://www.debian.org/security/2011/dsa-2248
• http://www.ejabberd.im/ejabberd-2.1.7
• http://www.process-one.net/en/ejabberd/release_notes/release_note_ejabberd_2.1.7/
• http://www.securityfocus.com/bid/48072
• https://bugzilla.redhat.com/show_bug.cgi?id=700454
• https://exchange.xforce.ibmcloud.com/vulnerabilities/67769
• https://git.process-one.net/ejabberd/mainline/commit/bd1df027c622e1f96f9eeaac612a6a956c1ff0b6

Affected products (34)

• cpe:2.3:a:process-one:ejabberd:*:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:0.9:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:0.9.1:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:0.9.8:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:1.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:1.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:1.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:1.1.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:1.1.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:1.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:1.1.3:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:1.1.14:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:2.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:2.0.0:beta1:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:2.0.0:rc1:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:2.0.1_2:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:2.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:2.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:2.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:2.0.5:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:2.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:2.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:2.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:2.1.3:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:2.1.4:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:2.1.5:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:3.0.0:alpha1:*:*:*:*:*:*
• cpe:2.3:a:process-one:ejabberd:3.0.0:alpha2:*:*:*:*:*:*
• cpe:2.3:a:process-one:exmpp:*:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:exmpp:0.9.1:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:exmpp:0.9.2:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:exmpp:0.9.3:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:exmpp:0.9.4:*:*:*:*:*:*:*
• cpe:2.3:a:process-one:exmpp:0.9.5:*:*:*:*:*:*:*

More vulnerabilities in Process-one Ejabberd

• CVE-2007-0903 — Critical (CVSS 10.0): Unspecified vulnerability in the mod_roster_odbc module in ejabberd before 1.1.3 has unknown impact and attack vectors.
• CVE-2014-8760 — Medium (CVSS 5.0): ejabberd before 2.1.13 does not enforce the starttls_required setting when compression is used, which causes clients to…
• CVE-2010-0305 — Medium (CVSS 5.0): ejabberd_c2s.erl in ejabberd before 2.1.3 allows remote attackers to cause a denial of service (daemon crash) via a…
• CVE-2013-6169 — Medium (CVSS 4.3): The TLS driver in ejabberd before 2.1.12 supports (1) SSLv2 and (2) weak SSL ciphers, which makes it easier for remote…
• CVE-2009-0934 — Medium (CVSS 4.3): Cross-site scripting (XSS) vulnerability in ejabberd before 2.0.4 allows remote attackers to inject arbitrary web…
• CVE-2011-4320 — Medium (CVSS 4.0): 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…

All CVEs affecting Process-one Ejabberd →

Other CWE-399 (Resource Management Errors) vulnerabilities

• CVE-2015-8104 — Critical (CVSS 10.0): The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a…
• CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
• CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
• CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
• CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
• CVE-2014-0560 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS…

Browse all CWE-399 (Resource Management Errors) vulnerabilities →