CVE-2016-9928Public exploitNetwork attack vector

Message interception via unverified roster pushes

Published Feb 6, 2020 · Updated Aug 6, 2024

Roster-push spoofing in MCabber before 1.0.4 allows remote attackers to intercept messages or alter rosters via crafted XMPP packets. The roster-push handler accepts an incoming IQ set without verifying that its from address is absent or matches the account's own JID. Any XMPP peer able to address the active client can replace a contact JID or add itself with the contact's presence privileges.

CVSS severity7.4
High
EPSS probability4.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Roster-push spoofing in MCabber before 1.0.4 allows remote attackers to intercept messages or alter rosters via crafted XMPP packets. The roster-push handler accepts an incoming IQ set without verifying that its from address is absent or matches the account's own JID. Any XMPP peer able to address the active client can replace a contact JID or add itself with the contact's presence privileges.

The record

CVE
CVE-2016-9928
Published
Feb 6, 2020
Updated
Aug 6, 2024
Vendor
MCabber
Product
MCabber
Classifications
CWE-269, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 6, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=before 1.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MCabber · MCabberversion=before 1.0.4

Published CVSS scores

5.8NVDAV:N/AC:M/Au:N/C:P/I:P/A:N
7.4NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1557Adversary-in-the-Middle

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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