CVE-2018-18922: add_user in AbiSoft Ticketly 1.0 allows remote attackers to create administrator accounts via an action/add_us

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2018-18922 is a critical-severity flaw (CVSS 9.8) affecting ticketly. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

add_user in AbiSoft Ticketly 1.0 allows remote attackers to create administrator accounts via an action/add_user.php POST request.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.4% (top 16%)
CISA exploited list	No
Weakness	CWE-425
Published	2018-12-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: abisoftgt

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

Am I affected?

Timeline

2018-12-13 19:29 UTCPublished CVE record published
2026-06-17 01:48 UTCUpdated Record last modified

abisoftgt ticketly DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison ticketly sudo apt install ticketly=<VERSION_BEFORE_1.0> sudo apt-mark hold ticketly

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

dnf --showduplicates list ticketly sudo dnf downgrade ticketly-<VERSION_BEFORE_1.0> sudo dnf versionlock add ticketly

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-2018-18922?

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

Is CVE-2018-18922 being exploited?

CVE-2018-18922 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-2018-18922 affect?

CVE-2018-18922 affects ticketly. Severity is critical (CVSS 9.8). add_user in AbiSoft Ticketly 1.0 allows remote attackers to create administrator accounts via an action/add_user.php POST request.

How urgent is CVE-2018-18922?

Priority 65/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2018-18923 CRITICAL 9.8 DOWNGRADE AbiSoft Ticketly 1.0 is affected by multiple SQL Injection vulnerabilities through the parameters name, catego

References

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