CVE-2026-2222VulnerabilityPublished 9 Feb 2026Updated 23 Feb 2026

CVE-2026-2222: code-projects Online Reviewer System · Cross Site Scripting

Affects code-projects Online Reviewer SystemSource CVE Database V5

Not known to be exploited · CVSS 4.8 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 4.0 base score

4.8Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 15% 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 9 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
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), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

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 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
code-projectsOnline Reviewer System	Affected =1.0	Fixed in–

AI-suggested

To mitigate CVE-2026-2222, organizations should first seek any official patches or updates from the vendor code-projects and apply them promptly once available. In the absence of patches, implement strict input validation on the 'firstname' parameter to reject or sanitize any input containing HTML or JavaScript code. Employ output encoding techniques to ensure that any user-supplied data rendered in the administrative interface is safely escaped to prevent script execution. Additionally, enforce Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts. Limit administrative interface exposure by restricting access via network segmentation or VPNs, and monitor logs for suspicious input patterns targeting the vulnerable endpoint. Educate administrators about phishing risks and the importance of not clicking on untrusted links. Regularly review and update web application firewall (WAF) rules to detect and block XSS attack vectors targeting this system. Finally, consider upgrading to newer, supported versions of the software that address this and other vulnerabilities.

Description

A weakness has been identified in code-projects Online Reviewer System 1.0. Affected by this vulnerability is an unknown functionality of the file /system/system/admins/manage/users/btn_functions.php. Executing a manipulation of the argument firstname can lead to cross site scripting. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks.

Impact

The primary impact of CVE-2026-2222 is the potential compromise of administrative user sessions through cross-site scripting attacks. Successful exploitation could allow attackers to execute arbitrary scripts in the browser of an administrator, leading to theft of session cookies, unauthorized actions within the application, or redirection to malicious sites. While the vulnerability does not directly affect system availability or allow privilege escalation, it undermines the integrity and confidentiality of administrative operations. Organizations relying on the Online Reviewer System 1.0 may face risks of data manipulation, unauthorized review modifications, or exposure of sensitive administrative functions. The public availability of exploit code increases the likelihood of exploitation attempts, especially in environments with weak perimeter defenses or insufficient input sanitization. The scope is limited to installations of this specific version, but the impact on affected organizations can be significant if administrative credentials or sessions are compromised.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 23 Feb 2026, 21:11 UTC

Technical details

References

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