VulnerabilityPublished 19 Jan 2026Updated 23 Feb 2026

CVE-2026-1135: itsourcecode Society Management System · Cross-site Scripting

Affects itsourcecode Society Management SystemSource CVE Database V5

Not known to be exploited · CVSS 5.3 Medium.

Data as of 26 Oct 2026, 09:16 UTC

CVSS 4.0 base score

5.3Medium

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 28% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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: None
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: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
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 19 Jan 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 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 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
itsourcecodeSociety Management System	Affected =1.0	Fixed in–

AI-suggested

To mitigate CVE-2026-1135, organizations should first check for any official patches or updates from itsourcecode and apply them promptly once available. In the absence of patches, implement strict input validation and output encoding on the Title parameter within /admin/activity.php to neutralize malicious scripts. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in the admin interface. Limit access to the admin panel by IP whitelisting or VPN to reduce exposure. Educate administrators about the risks of clicking untrusted links and encourage the use of security-aware browsers with XSS protection enabled. Regularly monitor logs for suspicious activity related to the admin interface. Consider deploying web application firewalls (WAFs) with rules to detect and block XSS payloads targeting the vulnerable parameter. Finally, conduct security audits and penetration testing focused on input validation to identify and remediate similar vulnerabilities proactively.

Description

A security flaw has been discovered in itsourcecode Society Management System 1.0. This impacts an unknown function of the file /admin/activity.php. The manipulation of the argument Title results in cross site scripting. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks.

Impact

The primary impact of CVE-2026-1135 is on the confidentiality and integrity of data within the Society Management System. Successful exploitation can allow attackers to steal session cookies, impersonate administrators, and perform unauthorized actions such as modifying records or escalating privileges. This can lead to data breaches, unauthorized disclosure of member information, and potential disruption of society management operations. Although availability impact is minimal, the loss of trust and potential regulatory consequences from data exposure can be significant. Organizations relying on this system for critical administrative functions may face operational risks and reputational damage. The medium severity score reflects that while exploitation is feasible remotely and without authentication, it requires user interaction, limiting the attack scope somewhat. However, the public release of exploit code increases the likelihood of opportunistic attacks, especially in environments with less security awareness or monitoring.

Summary

CVE-2026-1135 identifies a cross-site scripting vulnerability in the itsourcecode Society Management System version 1.0, specifically in the /admin/activity.php file. The vulnerability arises from insufficient input validation and output encoding of the Title parameter, which is manipulated by attackers to inject malicious JavaScript code. This XSS flaw is exploitable remotely without requiring authentication, but it necessitates user interaction, typically an administrator accessing a maliciously crafted URL or page. The vulnerability can be leveraged to execute arbitrary scripts in the context of the victim's browser session, potentially leading to session hijacking, theft of sensitive information, or unauthorized administrative actions. The CVSS 4.0 base score is 5.3, reflecting medium severity due to the ease of remote exploitation and the requirement for user interaction, but no privileges or authentication needed. No patches or official fixes are currently linked, and while no active exploits have been reported in the wild, the public availability of exploit code increases the urgency for mitigation. The vulnerability affects only version 1.0 of the product, which is used for managing societies or community groups, likely in administrative or membership contexts.

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 23 Feb 2026, 22:53 UTC

Technical details

References

Community reviews

Related threats