CVE-2025-65602: A template injection vulnerability in the /vip/v1/file/save component of ChanCMS v3.3.4 allows attackers to ex

This month

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2025-65602 is a critical-severity flaw (CVSS 9.8) affecting chancms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A template injection vulnerability in the /vip/v1/file/save component of ChanCMS v3.3.4 allows attackers to execute arbitrary code via a crafted POST request.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-94, CWE-1336
Published	2025-12-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: chancms

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

Am I affected?

Timeline

2025-12-10 20:16 UTCPublished CVE record published
2026-06-17 09:55 UTCUpdated Record last modified

chancms chancms DOWNGRADE

Affected: 3.3.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.3.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.3.4 (Debian / Ubuntu)

apt-cache madison chancms sudo apt install chancms=<VERSION_BEFORE_3.3.4> sudo apt-mark hold chancms

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

dnf --showduplicates list chancms sudo dnf downgrade chancms-<VERSION_BEFORE_3.3.4> sudo dnf versionlock add chancms

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-2025-65602?

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

Is CVE-2025-65602 being exploited?

CVE-2025-65602 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-2025-65602 affect?

CVE-2025-65602 affects chancms. Severity is critical (CVSS 9.8). A template injection vulnerability in the /vip/v1/file/save component of ChanCMS v3.3.4 allows attackers to execute arbitrary code via a crafted POST request.

How urgent is CVE-2025-65602?

Priority 51/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-10110 MEDIUM 6.3 UPGRADE A vulnerability was identified in ChanCMS up to 3.3.1
CVE-2025-11905 MEDIUM 6.3 UPGRADE A vulnerability was found in yanyutao0402 ChanCMS up to 3.3.2
CVE-2025-11902 MEDIUM 6.3 UPGRADE A vulnerability was detected in yanyutao0402 ChanCMS up to 3.3.2
CVE-2025-11903 MEDIUM 6.3 UPGRADE A flaw has been found in yanyutao0402 ChanCMS up to 3.3.2
CVE-2025-11904 MEDIUM 6.3 UPGRADE A vulnerability has been found in yanyutao0402 ChanCMS up to 3.3.2

References

← Back to latest CVEs