CVE-2015-20121: Next Click Ventures RealtyScript 4.0.2 contains SQL injection vulnerabilities that allow unauthenticated attac

This week

HIGH 8.2REMOTEDOWNGRADE

CVE-2015-20121 is a high-severity flaw (CVSS 8.2) affecting realtyscript. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Next Click Ventures RealtyScript 4.0.2 contains SQL injection vulnerabilities that allow unauthenticated attackers to manipulate database queries by injecting arbitrary SQL code through the GET parameter 'u_id' in /admin/users.php and the POST parameter 'agent[]' in /admin/mailer.php. Attackers can exploit time-based blind SQL injection techniques to extract sensitive database information or cause denial of service through sleep-based payloads.

Why this priority

High 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	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-89
Published	2026-03-16
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: nextclickventures

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

Am I affected?

Timeline

2026-03-16 14:17 UTCPublished CVE record published
2026-06-17 00:23 UTCUpdated Record last modified

nextclickventures realtyscript DOWNGRADE

Affected: 4.0.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.0.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 4.0.2 (Debian / Ubuntu)

apt-cache madison realtyscript sudo apt install realtyscript=<VERSION_BEFORE_4.0.2> sudo apt-mark hold realtyscript

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

dnf --showduplicates list realtyscript sudo dnf downgrade realtyscript-<VERSION_BEFORE_4.0.2> sudo dnf versionlock add realtyscript

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-2015-20121?

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

Is CVE-2015-20121 being exploited?

CVE-2015-20121 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-2015-20121 affect?

CVE-2015-20121 affects realtyscript. Severity is high (CVSS 8.2). Next Click Ventures RealtyScript 4.0.2 contains SQL injection vulnerabilities that allow unauthenticated attackers to manipulate database queries by injecting arbitrary SQL code through the GET parameter 'u_id' in /admin/users.php and the P

How urgent is CVE-2015-20121?

Priority 48/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

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References

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