CVE-2025-5525: A vulnerability was found in Jrohy trojan up to 2.15.3

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MEDIUM 5.6REMOTEUPGRADE

CVE-2025-5525 is a medium-severity flaw (CVSS 5.6) affecting trojan. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in Jrohy trojan up to 2.15.3. It has been declared as critical. This vulnerability affects the function LogChan of the file trojan/util/linux.go. The manipulation of the argument c leads to os command injection. The attack can be initiated remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.6 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	2.8% (top 14%)
CISA exploited list	No
Weakness	CWE-77, CWE-78
Published	2025-06-03
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: jrohy

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

Am I affected?

Timeline

2025-06-03 20:15 UTCPublished CVE record published
2026-06-17 09:48 UTCUpdated Record last modified

jrohy trojan UPGRADE

Affected: >= 2.0.0 and <= 2.15.3

Fixed in: newer than 2.15.3

Safe to downgrade to: a release before 2.0.0

1. Check installed version

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

2. UPGRADE to newer than 2.15.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade trojan

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade trojan

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)

apt-cache madison trojan sudo apt install trojan=<VERSION_BEFORE_2.0.0> sudo apt-mark hold trojan

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list trojan sudo dnf downgrade trojan-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add trojan

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-2025-5525?

trojan: upgrade to newer than 2.15.3. Exact commands for each OS are on this page.

Is CVE-2025-5525 being exploited?

CVE-2025-5525 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-2025-5525 affect?

CVE-2025-5525 affects trojan. Severity is medium (CVSS 5.6). A vulnerability was found in Jrohy trojan up to 2.15.3. It has been declared as critical. This vulnerability affects the function LogChan of the file trojan/util/linux.go. The manipulation of the argument c leads to os command injection. Th

How urgent is CVE-2025-5525?

Priority 51/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-55215 CRITICAL 9.8 UPGRADE An issue in trojan v.2.0.0 through v.2.15.3 allows a remote attacker to escalate privileges via the initializa

References

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