CVE-2023-2887: Authentication Bypass by Spoofing vulnerability in CBOT Chatbot allows Authentication Bypass. This issue affe

Q: How do I fix CVE-2023-2887?

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-2023-2887 being exploited?

CVE-2023-2887 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-2023-2887 affect?

CVE-2023-2887 affects cbot core, cbot panel. Severity is critical (CVSS 9.8). Authentication Bypass by Spoofing vulnerability in CBOT Chatbot allows Authentication Bypass. This issue affects Chatbot: before Core: v4.0.3.4 Panel: v4.0.3.7.

Q: How urgent is CVE-2023-2887?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADEUPGRADE

CVE-2023-2887 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.

Authentication Bypass by Spoofing vulnerability in CBOT Chatbot allows Authentication Bypass. 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	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-290
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-2023-2887?

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-2023-2887 being exploited?

CVE-2023-2887 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-2023-2887 affect?

CVE-2023-2887 affects cbot core, cbot panel. Severity is critical (CVSS 9.8). Authentication Bypass by Spoofing vulnerability in CBOT Chatbot allows Authentication Bypass. This issue affects Chatbot: before Core: v4.0.3.4 Panel: v4.0.3.7.

How urgent is CVE-2023-2887?

Priority 53/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

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-2023-2884 CRITICAL 9.8 UPGRADE UPGRADE Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG), Use of Insufficiently Random Values vulne
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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