VulnerabilityPublished 22 Feb 2026Updated 25 Feb 2026

CVE-2026-2934: YiFang CMS · Cross-site Scripting

Affects YiFang CMSSource CVE Database V5

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Public exploit available · CVSS 4.8 Medium.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 4.0 base score

4.8Medium

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 23% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: High
User Interaction: Passive
Vulnerable system confidentiality: None
Vulnerable system integrity: Low
Vulnerable system availability: None
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: High: The attacker requires privileges that provide significant (e.g., administrative) control over the vulnerable system allowing full access to the vulnerable system’s settings and files.
User Interaction: Passive: Successful exploitation of this vulnerability requires limited interaction by the targeted user with the vulnerable system and the attacker’s payload. These interactions would be considered involuntary and do not require that the user actively subvert protections built into the vulnerable system.
Vulnerable system confidentiality: None: There is no loss of confidentiality within 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: None: There is no impact to availability within 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 22 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 29 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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
YiFangCMS	Affected 2.0.0 – 2.0.5 6 affected builds	Fixed in–

AI-suggested

To mitigate CVE-2026-2934 effectively, organizations should first verify if they are running affected versions of YiFang CMS (2.0.0 through 2.0.5) and plan immediate upgrades to a patched version once available. In the absence of official patches, implement strict input validation and sanitization on the 'Name' parameter within the Extended Management Module to neutralize malicious script injections. Restrict administrative access to trusted personnel and enforce multi-factor authentication to reduce the risk of credential compromise. Educate administrators about phishing and social engineering risks to minimize user interaction exploitation. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in the browser context. Monitor logs for unusual administrative activity or unexpected input patterns targeting the vulnerable parameter. Additionally, consider isolating the CMS administrative interface behind VPNs or IP whitelisting to reduce exposure. Regularly back up CMS data and configurations to enable rapid recovery if an attack occurs.

Description

A security vulnerability has been detected in YiFang CMS up to 2.0.5. This impacts the function update of the file app/db/admin/D_friendLinkGroup.php of the component Extended Management Module. The manipulation of the argument Name leads to cross site scripting. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.

Impact

The primary impact of CVE-2026-2934 is on the integrity and confidentiality of the affected CMS environment. Successful exploitation allows an attacker to execute arbitrary scripts in the context of an administrator’s browser session, potentially leading to session hijacking, unauthorized actions, or data manipulation. While the vulnerability does not directly affect system availability, the resulting compromise could lead to defacement or unauthorized changes within the CMS, damaging organizational reputation and trust. Organizations relying on YiFang CMS for website or content management may face risks of targeted attacks, especially if administrative credentials are compromised or if attackers can socially engineer administrators to interact with malicious payloads. The requirement for high privileges and user interaction reduces the likelihood of widespread automated exploitation but does not eliminate risk, particularly in environments with weak internal controls or phishing susceptibility. The public disclosure of the vulnerability increases the urgency for remediation to prevent potential exploitation by opportunistic attackers.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 2 Mar 2026, 03:30 UTC

Technical details

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