CVE-2025-15671Public exploitNetwork attack vector

Customer account takeover via fixed session identifier

Published Aug 21, 2026 · Updated Aug 21, 2026

Session fixation in Welcart e-Commerce before 2.12.1 allows remote attackers to take over customer accounts through crafted login requests. The member authentication flow accepts a request-supplied uscesid value and skips session regeneration when that parameter remains on the login POST. The default member system and victim interaction are required; after the victim signs in, the attacker reuses the fixed cookie to read member details and act through the account.

CVSS severity5.4
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session fixation in Welcart e-Commerce before 2.12.1 allows remote attackers to take over customer accounts through crafted login requests. The member authentication flow accepts a request-supplied uscesid value and skips session regeneration when that parameter remains on the login POST. The default member system and victim interaction are required; after the victim signs in, the attacker reuses the fixed cookie to read member details and act through the account.

The record

CVE
CVE-2025-15671
Published
Aug 21, 2026
Updated
Aug 21, 2026
Vendor
Welcart Inc.
Product
Welcart e-Commerce
Classifications
CWE-287, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.12.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Welcart Inc. · Welcart e-Commerceversion=0 <2.12.1

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/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-287Improper Authentication
T1539Steal Web Session Cookie

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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