CVE-2025-59031

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-27 · updated 2026-10-07
Weakness: CWE-200

Description

Dovecot has provided a script to use for attachment to text conversion. This script unsafely handles zip-style attachments. Attacker can use specially crafted OOXML documents to cause unintended files on the system to be indexed and subsequently ending up in FTS indexes. Do not use the provided script, instead, use something else like FTS tika. No publicly available exploits are known.

Affected products

dovecot: before 2.4.3 — fixed in 2.4.3
Open-Xchange Dovecot: before 2.3.22.1; from 3.0.0 before 3.1.3 — fixed in 2.3.22.1, 3.1.3

How to fix

Upgrade to a fixed version: dovecot 2.4.3; Open-Xchange Dovecot 2.3.22.1, 3.1.3. Check the vendor advisory for mitigations.

References

https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json

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