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CVE-2026-103310

PayHere Payment Gateway 2.4.0 - 2.4.5 - Unauthenticated Payment Bypass via Unverified Payment Notification

CVSS score

5.3

EPSS probability

—

Risk score

0.5

Published

3 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Vulnerability description

DayBreach AI Explanation

Verified against sources

CVE-2026-103310: PayHere Payment Gateway Unauthenticated Payment Bypass Vulnerability

Sources read

1

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

The PayHere Payment Gateway WordPress plugin from version 2.4.0 through 2.4.5 fails to verify the authenticity of payment notifications when the merchant secret remains unset by default, allowing unauthenticated attackers to forge payment confirmations and mark any order as paid without actual payment [S0].

Why does it matter?

This vulnerability enables attackers to manipulate e-commerce orders by marking them as paid without executing real transactions, which can result in significant financial losses and integrity breaches [S0].

What should be done?

  • Configure the merchant secret to address the unset default state [S0]
  • Follow vendor advisories and updates [S0]
Chain of evidence and sources2 verified claims

PayHere Payment Gateway 2.4.0 ila 2.4.5 sürümleri, satıcı gizli anahtarı ayarlanmadığında ödeme bildirimlerinin kimliğini doğrulamaz [S0].

S0 · daybreach-canonicalS1 · cvelist

Kimliği doğrulanmayan saldırganlar ödeme onayını taklit ederek herhangi bir siparişi ödeme alınmadan ödenmiş işaretleyebilir [S0].

S0 · daybreach-canonicalS1 · cvelist
Show the technical text from the sources

The PayHere Payment Gateway WordPress plugin from 2.4.0 through 2.4.5 does not verify the authenticity of payment notifications when the merchant secret is unset, which is the default state, allowing unauthenticated attackers to forge a payment confirmation and mark any order as paid without payment.

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

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-103310 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1UnknownPayHere Payment Gateway View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
5.3CVSS V3_1MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NCVE CNA
5.3CVSS V31MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-103310 is associated with the following CWEs:

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')CWE-20: Improper Input Validation

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-103310 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsGerekmiyor
UserGerekmiyor

Official Sources and Advisories

https://wpscan.com/vulnerability/f3b66147-5910-4901-b595-12a5b1db5f8b/vendor-advisory

CVSS Vector Radar Chart

5.3 / 10
Attack VectorNetworkComplexityLowPrivilegesNoneUser Interact.NoneConfidentialityLowIntegrityNoneAvailabilityNone

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone required
User InteractionNone required
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)None
Availability (Erişilebilirlik)None

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

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CVE-2026-103310 · PayHere Payment Gateway 2.4.0 - 2.4.5 -…