Medium Logic error exploit reference

CVE-2025-15116 — OpenCart Single-Use Coupon race condition

A security flaw has been discovered in OpenCart up to 4.1.0.3. Affected by this issue is some unknown functionality of the component Single-Use Coupon Handler. Performing a manipulation results in race condition. The attack may be initiated remotely. The attack's complexity is rated as high. The exploitation is known to be difficult. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Published Dec 28, 2025 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: VulDB

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.4% (30-day exploitation probability)+5
Technical severity (medium)+3
CISA SSVC: exploitation "poc"+5

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.41%

ahead of 33% of scored CVEs · Oct 15, 2026

Affects

Opencart

CVSS base

4.8

Medium · 3 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

Proof of concept

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Opencart Opencart).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes matching the vulnerability class (logic error), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Opencart	Opencart	≤ 4.1.0.3	Vulnerable	NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

High

Privileges required

None

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
6.3	CVSS 4.0	Medium	—	—	VulDB via CVE Program (cve.org) e CISA ADP
2.9	CVSS 4.0	Low	—	—	cna@vuldb.com via NIST National Vulnerability Database
4.8	CVSS 3.1	Medium	2.2	2.5	nvd@nist.gov via NIST National Vulnerability Database
3.7	CVSS 3.1	Low	2.2	1.4	cna@vuldb.com via NIST National Vulnerability Database
3.7	CVSS 3.1	Low	—	—	VulDB via CVE Program (cve.org) e CISA ADP
3.7	CVSS 3.0	Low	—	—	VulDB via CVE Program (cve.org) e CISA ADP
2.6	CVSS 2.0	Low	4.9	2.9	cna@vuldb.com via NIST National Vulnerability Database
2.6	CVSS 2.0	Low	—	—	VulDB via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L (score shown at the top: nvd@nist.gov)

Scoring entities (NIST, CNA, ADP) score independently; each score is shown with its origin. For prioritization we use 4.8 (NVD (NIST)) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-362 · Race Condition

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 15, 2026 · 3 reading(s) · max 0.41%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).

web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

2026
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
CVSS changed · 4.8
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Modified
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
2025
CVE published
Dec 28, 2025 · VulDB

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

5 on the record

gist.github.com/KhanMarshaI/a55f125a55de1c0d4f41e66236027e01
Exploit, Third Party Advisory, related, NIST National Vulnerability Database
vuldb.com/
Third Party Advisory, VDB Entry, vdb-entry, technical-description, NIST National Vulnerability Database
vuldb.com/
Third Party Advisory, VDB Entry, third-party-advisory, NIST National Vulnerability Database
gist.github.com/KhanMarshaI/a55f125a55de1c0d4f41e66236027e01
Exploit, Third Party Advisory, exploit, NIST National Vulnerability Database
vuldb.com/
Permissions Required, VDB Entry, signature, permissions-required, NIST National Vulnerability Database

Elsewhere on this site

Opencart
every CVE for this vendor

Logic error
same class

CWE-362
other pages naming this weakness

Related CVEs (same products)

Critical CVE-2026-18412 The OpenCart v4.2.0.0 extension installer contains a directory traversal vulnerability Aug 10, 2026
Medium CVE-2021-47953 OpenCart 3.0.3.7 Cross-Site Request Forgery via account/password May 10, 2026
Medium CVE-2021-47946 OpenCart 3.0.3.6 Account Takeover via Cross Site Request Forgery May 10, 2026
Critical CVE-2021-47923 OpenCart 3.0.3.8 Session Fixation via OCSESSID Cookie May 10, 2026
High CVE-2024-58341 OpenCart Core 4.0.2.3 SQL Injection via search Parameter Mar 25, 2026
Medium CVE-2026-3714 OpenCart Incomplete Fix CVE-2024-36694 template.php save special elements used in a template engine Mar 8, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No fixed version, patch or mitigation documented.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2025-15116 is "OpenCart Single-Use Coupon race condition", rated Medium. It affects Opencart (Opencart); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 4.8 describes technical severity. EPSS 0.41% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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