CVE-2025-35431: CISA Thorium LDAP injection

Severity: medium (CVSS 5.4 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: 2025-09-17 · updated 2026-06-17
Weakness: CWE-90

Description

CISA Thorium does not escape user controlled strings used in LDAP queries. An authenticated remote attacker can modify LDAP authorization data such as group memberships. Fixed in 1.1.1.

Affected products

CISA Thorium: from 1.0.0 before 1.1.1 — fixed in 1.1.1

How to fix

Upgrade to a fixed version: CISA Thorium 1.1.1. Check the vendor advisory for mitigations.

References

https://github.com/cisagov/thorium/commit/7c94a0b9bc2dc55e0c307360452f348bac06820c#diff-45e1e58dfb6faacf9efe778c31ead287d8e13ae07c5dad084c792bc4a0605a68R1007-R1008
https://github.com/cisagov/thorium/releases/tag/1.1.1
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2025/va-25-259-01.json
https://www.cve.org/CVERecord?id=CVE-2025-35431

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