HOME VULNERABILITIESCVE-2015-20121

CRITICAL

CVE-2015-20121

CWE-89Published: March 16, 2026· Updated: Mar 18, 2026

9.8

CVSS v3.1

EPSS:0.06%probability of exploitation in 30 daysPercentile:18.7th

Official Description

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.

Technical Analysis

CVE-2015-20121 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-89): SQL injection vulnerabilities allow attackers to manipulate database queries, potentially exposing or modifying sensitive data.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

nextclickventures1 product

realtyscript

Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://www.zeroscience.mk/en/vulnerabilities/ZSL-2015-5270.php

ADVISORYhttps://www.exploit-db.com/exploits/38497

ADVISORYhttps://www.vulncheck.com/advisories/realtyscript-sql-injection-via-u-id-and-agent-parameters

All References (3)

→

http://www.zeroscience.mk/en/vulnerabilities/ZSL-2015-5270.phpExploit · Third Party Advisory

→

https://www.exploit-db.com/exploits/38497Exploit · Third Party Advisory · VDB Entry

→

https://www.vulncheck.com/advisories/realtyscript-sql-injection-via-u-id-and-agent-parametersThird Party Advisory

Quick Facts

CVE IDCVE-2015-20121

CVSS Score9.8 / 10

SeverityCRITICAL

WeaknessCWE-89

CISA KEVNo

EPSS (30d)0.06%

Affected1 vendor

PublishedMar 16, 2026

Related CVEs (CWE-89)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2015-20121 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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