CVE-2025-8266: A vulnerability has been found in yanyutao0402 ChanCMS up to 3.1.2 and classified as critical

Q: How do I fix CVE-2025-8266?

chancms: upgrade to 3.1.3. Exact commands for each OS are on this page.

Q: Is CVE-2025-8266 being exploited?

CVE-2025-8266 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-8266 affect?

CVE-2025-8266 affects chancms. Severity is medium (CVSS 6.3). A vulnerability has been found in yanyutao0402 ChanCMS up to 3.1.2 and classified as critical. Affected by this vulnerability is the function getArticle of the file app/modules/cms/controller/collect.js. The manipulation of the argument tar

Q: How urgent is CVE-2025-8266?

Priority 43/100. Public exploit reference

This month

MEDIUM 6.3UPGRADE

CVE-2025-8266 is a medium-severity flaw (CVSS 6.3) affecting chancms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability has been found in yanyutao0402 ChanCMS up to 3.1.2 and classified as critical. Affected by this vulnerability is the function getArticle of the file app/modules/cms/controller/collect.js. The manipulation of the argument targetUrl leads to deserialization. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 3.1.3 is able to address this issue. It is recommended to

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-20, CWE-502
Published	2025-07-28
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: chancms

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

Am I affected?

Timeline

2025-07-28 09:15 UTCPublished CVE record published
2026-06-17 10:06 UTCUpdated Record last modified

chancms chancms UPGRADE

Affected: < 3.1.3

Fixed in: 3.1.3

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.1.3 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade chancms

Note

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

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Nuclei scan template: ChanCMS <= 3.1. - Remote Code Execution

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-2025-8266?

chancms: upgrade to 3.1.3. Exact commands for each OS are on this page.

Is CVE-2025-8266 being exploited?

CVE-2025-8266 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-2025-8266 affect?

CVE-2025-8266 affects chancms. Severity is medium (CVSS 6.3). A vulnerability has been found in yanyutao0402 ChanCMS up to 3.1.2 and classified as critical. Affected by this vulnerability is the function getArticle of the file app/modules/cms/controller/collect.js. The manipulation of the argument tar

How urgent is CVE-2025-8266?

Priority 43/100. Public exploit reference

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

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