CVE-2025-30073Public exploitNetwork attack vector

Employee-card over-crediting via reusable transaction references

Published Mar 26, 2025 · Updated Mar 27, 2025

Business logic error in OPC cardsystems WebApp Aufwertung 2.1.0 allows remote attackers to over-credit employee cards. The /api start-payment action accepts a caller-supplied ref without binding it uniquely to an amount, so a low-value payment can confirm an earlier high-value transaction. No privileges or user interaction are required; successful abuse credits more money to a card than the completed payment funded.

CVSS severity7.5
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Business logic error in OPC cardsystems WebApp Aufwertung 2.1.0 allows remote attackers to over-credit employee cards. The /api start-payment action accepts a caller-supplied ref without binding it uniquely to an amount, so a low-value payment can confirm an earlier high-value transaction. No privileges or user interaction are required; successful abuse credits more money to a card than the completed payment funded.

The record

CVE
CVE-2025-30073
Published
Mar 26, 2025
Updated
Mar 27, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-488, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-488Exposure of Data Element to Wrong Session
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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