CVE-2018-18467: An issue was discovered in Daniel Gultsch Conversations 2.3.4

This month

HIGH 7.5REMOTEDOWNGRADE

CVE-2018-18467 is a high-severity flaw (CVSS 7.5) affecting conversations. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in Daniel Gultsch Conversations 2.3.4. It is possible to spoof a custom message to an existing opened conversation by sending an intent.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 33%)
CISA exploited list	No
Weakness	CWE-200
Published	2018-10-23
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: conversations

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-10-23 21:30 UTCPublished CVE record published
2026-06-17 01:47 UTCUpdated Record last modified

conversations conversations DOWNGRADE

Affected: 2.3.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3.4

1. Check installed version

apt-cache policy conversations || rpm -q conversations || conversations --version

2. No fixed release: DOWNGRADE to a release before 2.3.4 (Debian / Ubuntu)

apt-cache madison conversations sudo apt install conversations=<VERSION_BEFORE_2.3.4> sudo apt-mark hold conversations

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list conversations sudo dnf downgrade conversations-<VERSION_BEFORE_2.3.4> sudo dnf versionlock add conversations

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-18467?

conversations: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-18467 being exploited?

CVE-2018-18467 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-18467 affect?

CVE-2018-18467 affects conversations. Severity is high (CVSS 7.5). An issue was discovered in Daniel Gultsch Conversations 2.3.4. It is possible to spoof a custom message to an existing opened conversation by sending an intent.

How urgent is CVE-2018-18467?

Priority 48/100. High severity; Remotely exploitable, no login, no user action

References

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