CVE-2026-1136VulnerabilityPublished 19 Jan 2026Updated 23 Feb 2026

CVE-2026-1136: lcg0124 BootDo · Cross Site Scripting

Affects lcg0124 BootDoSource CVE Database V5

Not known to be exploited · CVSS 5.1 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 4.0 base score

5.1Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 19% 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: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: Low
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: 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: 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 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
lcg0124BootDo	Affected =e93dd428ef6f5c881aa74d49a2099ab0cf1e0fcb	Fixed in–

AI-suggested

To mitigate CVE-2026-1136, organizations should implement strict input validation and output encoding on all user-supplied data, particularly in the content, author, and title fields processed by the Save function in ContentController. Employ context-aware encoding (e.g., HTML entity encoding) to neutralize script injection attempts. Deploy a robust Content Security Policy (CSP) that restricts the execution of inline scripts and limits sources of executable code. Regularly update BootDo to the latest commits or releases that address this vulnerability once available, monitoring the project's repository for patches. Conduct thorough code reviews and security testing focusing on XSS vectors in custom extensions or plugins. Additionally, implement web application firewalls (WAFs) with rules designed to detect and block XSS payloads targeting the affected endpoints. Educate users about phishing risks and encourage cautious behavior when interacting with links or content from untrusted sources. Finally, monitor logs and user reports for signs of exploitation attempts or unusual activity related to the vulnerable components.

Description

A weakness has been identified in lcg0124 BootDo up to e93dd428ef6f5c881aa74d49a2099ab0cf1e0fcb. Affected is the function Save of the file /blog/bContent/save of the component ContentController. This manipulation of the argument content/author/title causes cross site scripting. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks. This product follows a rolling release approach for continuous delivery, so version details for affected or updated releases are not provided.

Impact

The primary impact of CVE-2026-1136 is the compromise of user confidentiality and integrity through the execution of arbitrary scripts in victims' browsers. Successful exploitation can lead to theft of session cookies, enabling account takeover, unauthorized actions performed on behalf of users, and phishing attacks via content manipulation. For organizations, this can result in reputational damage, loss of customer trust, and potential regulatory penalties if sensitive data is exposed. Since the vulnerability is remotely exploitable without authentication, attackers can target any user visiting affected BootDo-powered web applications. The rolling release nature of BootDo may delay patch adoption, increasing exposure time. Additionally, attackers could use the XSS vector as a foothold for further attacks such as delivering malware or pivoting within internal networks. Overall, the vulnerability poses a moderate risk to organizations relying on BootDo for content management, especially those with high user interaction or sensitive data processing.

Summary

CVE-2026-1136 identifies a cross-site scripting (XSS) vulnerability in the BootDo web application framework developed by lcg0124. The flaw exists in the Save function of the ContentController component, located at the endpoint /blog/bContent/save. This function improperly handles user-supplied input parameters such as content, author, and title, failing to adequately sanitize or encode them before rendering. As a result, an attacker can inject malicious JavaScript code that executes in the context of the victim's browser when they access the affected page. The vulnerability is remotely exploitable without requiring authentication, though it requires user interaction (e.g., clicking a crafted link or visiting a malicious page). The CVSS 4.0 score is 5.1 (medium severity), reflecting the ease of exploitation (network vector, low attack complexity) and the potential impact on confidentiality and integrity, but limited impact on availability. The product follows a rolling release model, so affected versions are identified by specific commit hashes rather than traditional version numbers, complicating patch management. Although no active exploitation in the wild has been reported, a public exploit is available, increasing the likelihood of attacks. The vulnerability can be leveraged for session hijacking, phishing, or defacement, undermining user trust and potentially leading to further compromise.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 23 Feb 2026, 22:54 UTC

Technical details

References

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