CVE-2020-35456: The Taidii Diibear Android application 2.4.0 and all its derivatives allow attackers to view private chat mess

Routine

MEDIUM 5.5DOWNGRADE

CVE-2020-35456 is a medium-severity flaw (CVSS 5.5) affecting diibear. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Taidii Diibear Android application 2.4.0 and all its derivatives allow attackers to view private chat messages and media files via logcat because of excessive logging.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-319
Published	2021-03-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: taidii

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

Am I affected?

Timeline

2021-03-17 15:15 UTCPublished CVE record published
2026-06-17 03:13 UTCUpdated Record last modified

taidii diibear DOWNGRADE

Affected: 2.4.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.4.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.4.0 (Debian / Ubuntu)

apt-cache madison diibear sudo apt install diibear=<VERSION_BEFORE_2.4.0> sudo apt-mark hold diibear

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

dnf --showduplicates list diibear sudo dnf downgrade diibear-<VERSION_BEFORE_2.4.0> sudo dnf versionlock add diibear

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-2020-35456?

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

Is CVE-2020-35456 being exploited?

CVE-2020-35456 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-2020-35456 affect?

CVE-2020-35456 affects diibear. Severity is medium (CVSS 5.5). The Taidii Diibear Android application 2.4.0 and all its derivatives allow attackers to view private chat messages and media files via logcat because of excessive logging.

How urgent is CVE-2020-35456?

Priority 31/100. No elevated risk signals yet.

Software pages

Android vulnerabilities

Related CVEs

CVE-2020-35455 HIGH 7.8 DOWNGRADE The Taidii Diibear Android application 2.4.0 and all its derivatives allow attackers to obtain user credential
CVE-2020-35454 MEDIUM 6.8 DOWNGRADE The Taidii Diibear Android application 2.4.0 and all its derivatives allow attackers to obtain user credential

References

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