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Fencer Intel
high 7.4

CVE-2016-9928 json

MCabber before 1.0.4 is vulnerable to roster push attacks, which allows remote attackers to intercept communications, or add themselves as…

published 2020-02-06 6 y ago modified 2026-06-17 4 mo ago also EUVD-2016-10715

cvss
7.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.5%
EPSS 4.5% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

MCabber before 1.0.4 is vulnerable to roster push attacks, which allows remote attackers to intercept communications, or add themselves as an entity on a 3rd party's roster as another user, which will also garner associated privileges, via crafted XMPP packets.

Patch / fix

  • mcabber mcabber 1.0.4
  • mcabber Debian 13, Debian 12 0.10.2-1.1

debian advisories DEBIAN-CVE-2016-9928

  • mcabber Ubuntu 16.04 LTS 0.10.2-1+deb8u1build0.16.04.1

ubuntu advisories UBUNTU-CVE-2016-9928

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libqxmpp openSUSE Tumbleweed 1.16.1-1.1

opensuse advisories openSUSE-SU-2026:11142-1

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-2016-9928 updated cvss 4.6

mcabber: remote attackers can modify the roster and intercept messages via a crafted roster-push IQ stanza

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

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

4.51% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=1403790 referenced PoC, tagged "exploit" by a source, unverified
  • bugs.debian.org https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=845258 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD 2.0 5.8 AV:N/AC:M/Au:N/C:P/I:P/A:N

Affected products

  • MCabber MCabber

Classification

Weakness
  • CWE-269 Improper Privilege Management

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.