CVE-2025-40670: Incorrect authorization vulnerability in TCMAN's GIM v11

Routine

HIGH 8.8DOWNGRADE

CVE-2025-40670 is a high-severity flaw (CVSS 8.8) affecting gim. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Incorrect authorization vulnerability in TCMAN's GIM v11. This vulnerability allows an unprivileged attacker to create a user and assign it many privileges by sending a POST request to /PC/frmGestionUser.aspx/updateUser.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-863
Published	2025-06-09
Last modified	2026-06-17

Publisher (CNA): Spanish National Cybersecurity Institute, S.A. (INCIBE) · Vendor: tcman

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-06-09 13:15 UTCPublished CVE record published
2026-06-17 09:21 UTCUpdated Record last modified

tcman gim DOWNGRADE

Affected: 11.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.0

1. Check installed version

apt-cache policy gim || rpm -q gim || gim --version

2. No fixed release: DOWNGRADE to a release before 11.0 (Debian / Ubuntu)

apt-cache madison gim sudo apt install gim=<VERSION_BEFORE_11.0> sudo apt-mark hold gim

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list gim sudo dnf downgrade gim-<VERSION_BEFORE_11.0> sudo dnf versionlock add gim

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-40670?

gim: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-40670 being exploited?

CVE-2025-40670 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-40670 affect?

CVE-2025-40670 affects gim. Severity is high (CVSS 8.8). Incorrect authorization vulnerability in TCMAN's GIM v11. This vulnerability allows an unprivileged attacker to create a user and assign it many privileges by sending a POST request to /PC/frmGestionUser.aspx/updateUser.

How urgent is CVE-2025-40670?

Priority 37/100. High severity

Related CVEs

CVE-2025-41013 CRITICAL 9.8 UPGRADE SQL injection vulnerability in TCMAN GIM v11 in version 20250304
CVE-2025-41014 HIGH 7.5 UPGRADE User Enumeration Vulnerability in TCMAN GIM v11 version 20250304
CVE-2025-41015 HIGH 7.5 UPGRADE User Enumeration Vulnerability in TCMAN GIM v11 version 20250304
CVE-2025-41012 MEDIUM 5.3 UPGRADE Unauthorized access vulnerability in TCMAN GIM v11 version 20250304
CVE-2025-40669 MEDIUM 6.5 DOWNGRADE Incorrect authorization vulnerability in TCMAN's GIM v11

References

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