Skip to content
Fencer Intel
high 7.5

CVE-2011-1755 json

jabberd2 before 2.2.14 does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of servi…

published 2011-06-21 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-1754

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.7%
EPSS 3.7% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

jabberd2 before 2.2.14 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.

Patch / fix

  • jabberd2 jabberd2 2.2.14
  • apple mac_os_x 10.6.8, 10.7.2
  • apple mac_os_x_server 10.6.8, 10.7.2
  • jabberd2 Debian 14, Debian 13, Debian 12 2.2.8-2.1

debian advisories DEBIAN-CVE-2011-1755

  • jabberd network satellite 5.4, network proxy 5.4 2.2.8-12.el5sat

red hat advisories RHSA-2011:0882RHSA-2011:0881

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-1755 updated cvss 5.0

jabberd: DoS via the XML "billion laughs attack"

  • Red Hat Satellite 5.4 (RHEL v.5) jabberd 2.2.8-12.el5sat
    fixed: vendor fix RHSA-2011:0882
  • Red Hat Satellite Proxy 5.4 (RHEL v.5) jabberd 2.2.8-12.el5sat
    fixed: vendor fix RHSA-2011:0881

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.66% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-776 Improper Restriction of Recursive Entity References in DTDs

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.