CVE-2018-15888: An issue was discovered in ASPCMS 2.5.6

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2018-15888 is a critical-severity flaw (CVSS 9.8) affecting aspcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in ASPCMS 2.5.6. When registering ordinary users in the addUser function of the /member/reg.asp page, they can be registered with the super administrators GroupID directly.

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	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-20
Published	2018-08-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: aspcms

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

Am I affected?

Timeline

2018-08-26 21:29 UTCPublished CVE record published
2026-06-17 01:43 UTCUpdated Record last modified

aspcms aspcms DOWNGRADE

Affected: 2.5.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.5.6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.5.6 (Debian / Ubuntu)

apt-cache madison aspcms sudo apt install aspcms=<VERSION_BEFORE_2.5.6> sudo apt-mark hold aspcms

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

dnf --showduplicates list aspcms sudo dnf downgrade aspcms-<VERSION_BEFORE_2.5.6> sudo dnf versionlock add aspcms

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-2018-15888?

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

Is CVE-2018-15888 being exploited?

CVE-2018-15888 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-2018-15888 affect?

CVE-2018-15888 affects aspcms. Severity is critical (CVSS 9.8). An issue was discovered in ASPCMS 2.5.6. When registering ordinary users in the addUser function of the /member/reg.asp page, they can be registered with the super administrators GroupID directly.

How urgent is CVE-2018-15888?

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

Related CVEs

CVE-2017-14653 MEDIUM 6.5 DOWNGRADE member/Orderinfo.asp in ASP4CMS AspCMS 2.7.2 allows remote authenticated users to read arbitrary order informa

References

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