VulnerabilityPublished 27 Jul 2025Updated 28 Jul 2025

CVE-2025-8228: yanyutao0402 ChanCMS · Server-Side Request Forgery

Affects yanyutao0402 ChanCMSSource CVE Database V5

Public exploit available · CVSS 5.3 Medium.

Data as of 26 Oct 2026, 12:55 UTC

CVSS 4.0 base score

5.3Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.6% chance of exploitation in 30 days – higher than 51% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: None
Vulnerable system confidentiality: Low
Vulnerable system integrity: Low
Vulnerable system availability: Low
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Threat metrics

Exploit Maturity: POC

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the Vulnerable System are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 27 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
GitHubyanyutao0402/ChanCMS`pkg:github/yanyutao0402/ChanCMS`Other threats	Affected =3.1.0 =3.1.1 =3.1.2	Fixed in–

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AI-suggested

Immediate upgrade of ChanCMS installations to version 3.1.3 or later to apply the official patch addressing the SSRF vulnerability.
Implement strict input validation and sanitization on all user-controllable parameters, especially those that influence server-side HTTP requests, to prevent malicious URL injection.
Employ network-level controls such as egress filtering and firewall rules to restrict the CMS server's ability to make arbitrary outbound requests, limiting it to only necessary external endpoints.
Use web application firewalls (WAFs) configured to detect and block SSRF attack patterns targeting the getPages endpoint.
Conduct regular security audits and penetration testing focused on SSRF and related vulnerabilities to identify and remediate similar issues proactively.
Monitor server logs for unusual outbound request patterns that could indicate exploitation attempts.
Segment internal networks to minimize the impact of potential SSRF exploitation by restricting access from the CMS server to sensitive internal services.

Description

A vulnerability was found in yanyutao0402 ChanCMS up to 3.1.2. It has been rated as critical. Affected by this issue is the function getPages of the file /cms/collect/getPages. The manipulation of the argument targetUrl leads to server-side request forgery. The attack may 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 upgrade the affected component.

Impact

For European organizations using ChanCMS versions 3.1.0 through 3.1.2, this SSRF vulnerability presents a moderate risk. Attackers could exploit this flaw to access internal network resources that are otherwise inaccessible externally, potentially exposing sensitive internal services or data. This could lead to unauthorized information disclosure or facilitate lateral movement within the network. Organizations in sectors with stringent data protection requirements, such as finance, healthcare, and government, could face compliance risks if internal data is exposed. Additionally, SSRF can be a stepping stone for more sophisticated attacks, including server compromise or pivoting to critical infrastructure. The medium CVSS score suggests that while the vulnerability is not trivially exploitable to cause widespread disruption, the risk is non-negligible, especially given the public disclosure of the exploit. European organizations relying on ChanCMS for web content management should prioritize patching to prevent potential reconnaissance or exploitation attempts that could undermine network security and data confidentiality.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 4 Aug 2025, 01:06 UTC

Technical details

References

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