CVE-2026-13602Network attack vector

Account takeover via cross-feature signature reuse

Published Jul 1, 2026 · Updated Jul 1, 2026

Improper input validation in pretix and seven payment plugins allows remote authenticated users to take over any backend session. Payment session transports accept any correctly signed session parameters, while a redirect feature uses the same key and salt to sign attacker-chosen content. Access to one backend event permits arbitrary session writes and impersonation of a guessed user ID, exposing that user's data and privileges.

CVSS severityUnavailable
Unscored
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in pretix and seven payment plugins allows remote authenticated users to take over any backend session. Payment session transports accept any correctly signed session parameters, while a redirect feature uses the same key and salt to sign attacker-chosen content. Access to one backend event permits arbitrary session writes and impersonation of a guessed user ID, exposing that user's data and privileges.

The record

CVE
CVE-2026-13602
Published
Jul 1, 2026
Updated
Jul 1, 2026
Vendor
pretix GmbH
Product
pretix-bitpay
Classifications
CWE-323, CWE-20, T1550.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 1, 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 <1.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

pretix GmbH · pretix-bitpayversion=0 <1.5.3
pretix GmbH · pretixversion=2026.4.0 <2026.4.5; version=2026.5.0 <2026.5.3; version=4.14.0 <2026.3.5
pretix GmbH · pretix-mollieversion=0 <2.5.7
pretix GmbH · pretix-oppwaversion=0 <1.4.4
pretix GmbH · pretix-payoneversion=0 <1.4.3
pretix GmbH · pretix-sofortversion=0 <1.4.2
pretix GmbH · pretix-saferpayversion=0 <1.6.3
pretix GmbH · pretix-secuconnectversion=0 <1.0.4

Published CVSS scores

7.7rami.ioCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-323Reusing a Nonce, Key Pair in Encryption
CWE-20Improper Input Validation
T1550.004Use Alternate Authentication Material: Web Session Cookie

Public exploit references

No public exploit references are available in this record.

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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