Skip to main content

Boteraser | Website and Server Security Solutions

🛡️ CVE-2026-2452 — newsletters

🟡 CVSS 6.5 — Medium ✅ No Known Exploit CWE-627 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Emails sent by pretix can utilize placeholders that will be filled with customer data. For example, when {name}

is used in an email template, it will be replaced with the buyer's

name for the final email. This mechanism contained a security-relevant bug:

It was possible to exfiltrate information about the pretix system through specially crafted placeholder names such as {{event.__init__.__code__.co_filename}}.

This way, an attacker with the ability to control email templates

(usually every user of the pretix backend) could retrieve sensitive

information from the system configuration, including even database

passwords or API keys. pretix does include mechanisms to prevent the usage of such

malicious placeholders, however due to a mistake in the code, they were

not fully effective for this plugin.

Out of caution, we recommend that you rotate all passwords and API keys contained in your pretix.cfg https://docs.pretix.eu/self-hosting/config/  file.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: None.
  • Availability impact: None.

Weakness class

CVE-2026-2452 is classified as CWE-627: Dynamic Variable Evaluation. In a language where the user can influence the name of a variable at runtime, if the variable names are not controlled, an attacker can read or write to arbitrary variables, or access arbitrary functions.

Affected software

CVE-2026-2452 is recorded against 2 packages.

  • newsletters
  • pretix (from 4.16.0 up to 2026.1.1)

Timeline and source

Published on 16 February 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

pretix.eu

Other advisories for this package

newsletters has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-627: Dynamic Variable Evaluation) in other software:

Details

Severity MEDIUM
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE CWE-627
Public Exploit ✅ No
Source NVD
Published 2026-02-16
Updated 2026-08-20
Modified 2026-06-17

Affected Packages

Software From version Fixed in
newsletters — —
pretix 4.16.0 2026.1.1

References

Similar Threats

Vulnerability Monitoring

Track new vulnerabilities in newsletters

CVE-2026-2452 is rated CVSS 6.5 Medium. BotEraser monitors your WordPress installation and notifies you when software you use appears in our vulnerability database.

Set Up Free Alerts →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

Browse related advisories

All advisoriesCVECVE 2026
✓