VulnerabilityPublished 18 Mar 2024Updated 21 Nov 2024

CVE-2024-29154: fabric · Cross-site Scripting

Affects fabricSource CVE Database V5

Not known to be exploited · CVSS 7.4 High.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score

7.4High

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:3.1/AC:L/AV:N/A:L/C:L/I:L/PR:L/S:C/UI:N

Attack Complexity: Low
Attack Vector: Network
Availability: Low
Confidentiality: Low
Integrity: Low
Privileges Required: Low
Scope: Changed
User Interaction: None

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

Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, 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).
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 impacted component 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 impacted component.
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 impacted component.
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 on the impacted component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Mar 2024
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 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
npmfabric`pkg:npm/fabric`Other threats	Affected <=1.3.0	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

To mitigate CVE-2024-29154, organizations should immediately audit and sanitize all inputs that are processed by the htmlToPlainText function and any other code paths that assign to innerHTML in the Fabric project. Avoid using innerHTML for dynamic content insertion; instead, use safer DOM manipulation methods like textContent or createElement with proper encoding. Implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts. Limit privileges of users and processes interacting with Fabric to reduce the attack surface. Monitor logs and network traffic for unusual activity indicative of XSS exploitation attempts. If possible, isolate the Fabric client environment to minimize lateral movement. Engage with the Fabric project maintainers for updates and patches, and apply them promptly once available. Additionally, conduct regular security code reviews and penetration testing focused on client-side code handling dynamic content.

Description

danielmiessler fabric through 1.3.0 allows installer/client/gui/static/js/index.js XSS because of innerHTML mishandling, such as in htmlToPlainText.

Impact

The exploitation of CVE-2024-29154 can lead to unauthorized script execution within the context of the affected Fabric client or GUI, potentially allowing attackers to steal sensitive information such as authentication tokens, manipulate application behavior, or perform actions on behalf of legitimate users. Since the vulnerability requires limited privileges but no user interaction, an attacker with some access to the system can escalate their capabilities or move laterally within an environment. The scope change means that the impact can extend beyond the immediate vulnerable component, affecting other integrated systems or users. This can result in data breaches, loss of integrity of deployment processes, and disruption of automated workflows. Organizations using Fabric in critical infrastructure, continuous integration/continuous deployment (CI/CD) pipelines, or cloud environments may face operational risks and reputational damage if this vulnerability is exploited.

Summary

CVE-2024-29154 is a cross-site scripting (XSS) vulnerability identified in the Fabric project, specifically affecting versions through 1.3.0. The root cause is improper handling of innerHTML assignments in the JavaScript file index.js, notably within the htmlToPlainText function. This function fails to sanitize or encode user-controllable input before injecting it into the DOM, allowing attackers to execute arbitrary JavaScript code in the context of the affected application. The vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation), a common and dangerous web security flaw. The CVSS 3.1 vector (7.4) indicates that the attack complexity is low (AC:L), no user interaction is required (UI:N), and the attack can be performed remotely (AV:N). However, privileges are required (PR:L), meaning the attacker must have some level of access to the system or application before exploiting the flaw. The scope is changed (S:C), indicating that the vulnerability affects resources beyond the initially vulnerable component, potentially impacting other parts of the system. Although no known exploits are currently reported in the wild, the vulnerability's characteristics make it a significant risk for organizations relying on Fabric for automation or deployment tasks. The lack of available patches necessitates immediate attention to code review and temporary mitigations.

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #1OWASP Top 10 A05:2025: Injection (opens in a new tab)
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Implementation · Architecture and Design
Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages.
Architecture and Design · Implementation · Attack Surface Reduction
Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide…
OWASP Cheat Sheets
Cross Site Scripting Prevention (opens in a new tab)
DOM based XSS Prevention (opens in a new tab)
Injection Prevention (opens in a new tab)
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
OWASP ASVS 4.0.3
V5.3.3 (opens in a new tab)
V1.5.1 (opens in a new tab)
Attack patterns
XSS Using MIME Type Mismatch (opens in a new tab)
DOM-Based XSS (opens in a new tab)
Reflected XSS (opens in a new tab)
Stored XSS (opens in a new tab)
Cross-Site Scripting (XSS) (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

sec1.io/security-advisories/cross-site-scripting-xss/ (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Feb 2026, 17:27 UTC

WeaknessesCWE-79

Technical details

References

Community reviews

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