CVE-2018-19290: In modules/HELPBOT_MODULE in Budabot 0.6 through 4.0, lax syntax validation allows remote attackers to perform

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2018-19290 is a critical-severity flaw (CVSS 9.8) affecting budabot. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In modules/HELPBOT_MODULE in Budabot 0.6 through 4.0, lax syntax validation allows remote attackers to perform a command injection attack against the PHP daemon with a crafted command, resulting in a denial of service or possibly unspecified other impact, as demonstrated by the "!calc 5 x 5" command. In versions before 3.0, modules/HELPBOT_MODULE/calc.php has the vulnerable code; in 3.0 and above, modules/HELPBOT_MODULE/HelpbotController.class.ph

Why this priority

Critical severity
EPSS top 9%: very likely to be exploited
Public exploit reference
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	4.0% (top 9%)
CISA exploited list	No
Weakness	CWE-78
Published	2018-11-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: budabot

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

Am I affected?

Timeline

2018-11-30 18:29 UTCPublished CVE record published
2026-06-17 01:49 UTCUpdated Record last modified

budabot budabot UPGRADE

Affected: >= 0.6 and <= 4.0

Fixed in: newer than 4.0

Safe to downgrade to: a release before 0.6

1. Check installed version

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

2. UPGRADE to newer than 4.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade budabot

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade budabot

Note

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

3. If no update is available yet, DOWNGRADE to a release before 0.6 (Debian / Ubuntu)

apt-cache madison budabot sudo apt install budabot=<VERSION_BEFORE_0.6> sudo apt-mark hold budabot

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list budabot sudo dnf downgrade budabot-<VERSION_BEFORE_0.6> sudo dnf versionlock add budabot

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-2018-19290?

budabot: upgrade to newer than 4.0. Exact commands for each OS are on this page.

Is CVE-2018-19290 being exploited?

CVE-2018-19290 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-2018-19290 affect?

CVE-2018-19290 affects budabot. Severity is critical (CVSS 9.8). In modules/HELPBOT_MODULE in Budabot 0.6 through 4.0, lax syntax validation allows remote attackers to perform a command injection attack against the PHP daemon with a crafted command, resulting in a denial of service or possibly unspecifie

How urgent is CVE-2018-19290?

Priority 67/100. Critical severity; EPSS top 9%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

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