CVE-2023-2884: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG), Use of Insufficiently Random Values vulne

Q: How do I fix CVE-2023-2884?

cbot core: upgrade to 4.0.3.4; cbot panel: upgrade to 4.0.3.7. Exact commands for each OS are on this page.

Q: Is CVE-2023-2884 being exploited?

CVE-2023-2884 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-2884 affect?

CVE-2023-2884 affects cbot core, cbot panel. Severity is critical (CVSS 9.8). Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG), Use of Insufficiently Random Values vulnerability in CBOT Chatbot allows Signature Spoofing by Key Recreation. This issue affects Chatbot: before Core: v4.0.3.4 Panel: v4

Q: How urgent is CVE-2023-2884?

Priority 52/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADEUPGRADE

CVE-2023-2884 is a critical-severity flaw (CVSS 9.8) affecting cbot core, cbot panel. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG), Use of Insufficiently Random Values vulnerability in CBOT Chatbot allows Signature Spoofing by Key Recreation. This issue affects Chatbot: before Core: v4.0.3.4 Panel: v4.0.3.7.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-330, CWE-338
Published	2023-05-25
Last modified	2026-06-17

Publisher (CNA): Computer Emergency Response Team of the Republic of Turkey · Vendor: cbot

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

Am I affected?

Timeline

2023-05-25 09:15 UTCPublished CVE record published
2026-06-17 05:53 UTCUpdated Record last modified

cbot cbot core UPGRADE

Affected: < 4.0.3.4

Fixed in: 4.0.3.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cbot-core || rpm -q cbot-core || cbot-core --version

2. UPGRADE to 4.0.3.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cbot-core

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cbot-core

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

cbot cbot panel UPGRADE

Affected: < 4.0.3.7

Fixed in: 4.0.3.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cbot-panel || rpm -q cbot-panel || cbot-panel --version

2. UPGRADE to 4.0.3.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cbot-panel

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cbot-panel

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2023-2884?

cbot core: upgrade to 4.0.3.4; cbot panel: upgrade to 4.0.3.7. Exact commands for each OS are on this page.

Is CVE-2023-2884 being exploited?

CVE-2023-2884 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-2023-2884 affect?

CVE-2023-2884 affects cbot core, cbot panel. Severity is critical (CVSS 9.8). Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG), Use of Insufficiently Random Values vulnerability in CBOT Chatbot allows Signature Spoofing by Key Recreation. This issue affects Chatbot: before Core: v4.0.3.4 Panel: v4

How urgent is CVE-2023-2884?

Priority 52/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-2887 CRITICAL 9.8 UPGRADE UPGRADE Authentication Bypass by Spoofing vulnerability in CBOT Chatbot allows Authentication Bypass. This issue affe
CVE-2023-2886 MEDIUM 4.3 UPGRADE UPGRADE Missing Origin Validation in WebSockets vulnerability in CBOT Chatbot allows Content Spoofing Via Application
CVE-2023-2885 HIGH 8.1 UPGRADE UPGRADE Improper Enforcement of Message Integrity During Transmission in a Communication Channel vulnerability in CBOT
CVE-2023-2883 HIGH 8.8 UPGRADE UPGRADE Authorization Bypass Through User-Controlled Key vulnerability in CBOT Chatbot allows Authentication Abuse, Au
CVE-2023-2882 CRITICAL 9.8 UPGRADE UPGRADE Generation of Incorrect Security Tokens vulnerability in CBOT Chatbot allows Token Impersonation, Privilege Ab

References

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