VulnerabilityPublished 3 Dec 2023Updated 3 Jun 2025

CVE-2022-4957: librespeed speedtest · Cross-site Scripting

Affects librespeed speedtestSource CVE Database V5

Not known to be exploited · CVSS 3.5 Low.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score

3.5Low

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

EPSS: 0.5% chance of exploitation in 30 days – higher than 46% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

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

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

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).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable 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.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within 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.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 3 Dec 2023
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
GitHublibrespeed/speedtest`pkg:github/librespeed/speedtest`Other threats	Affected 5.2.0 – 5.2.4 5 affected builds	Fixed in–

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AI-suggested

Immediate upgrade to librespeed speedtest version 5.2.5 or later, which contains the patch addressing this vulnerability.
Implement strict input validation and output encoding on all user-supplied inputs, especially parameters like 'id' in results/stats.php, to prevent script injection.
Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers accessing the speedtest application.
Conduct user awareness training to reduce the likelihood of users clicking on suspicious links that could exploit this vulnerability.
Monitor web application logs for unusual parameter values or repeated attempts to inject scripts via the 'id' parameter.
If upgrading immediately is not feasible, consider restricting access to the speedtest application to trusted internal networks or authenticated users only, reducing exposure.
Regularly review and update web application security configurations and perform periodic vulnerability assessments to detect similar issues proactively.

Description

A vulnerability was found in librespeed speedtest up to 5.2.4. It has been declared as problematic. Affected by this vulnerability is an unknown functionality of the file results/stats.php. The manipulation of the argument id leads to cross site scripting. The attack can be launched remotely. Upgrading to version 5.2.5 is able to address this issue. The patch is named a85f2c086f3449dffa8fe2edb5e2ef3ee72dc0e9. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-246643.

Impact

For European organizations, the impact of this XSS vulnerability is generally low but should not be underestimated. Successful exploitation could allow attackers to perform actions such as session hijacking, phishing, or delivering malicious payloads to users interacting with the speedtest application. This could lead to compromised user accounts or unauthorized actions within the application context. While the vulnerability does not directly affect system confidentiality or availability, it can be a stepping stone for more sophisticated attacks, especially if the speedtest service is integrated into broader network monitoring or diagnostic platforms. Organizations relying on librespeed speedtest for internal or customer-facing services may face reputational damage if users are targeted via this vulnerability. Additionally, regulatory frameworks such as GDPR require organizations to maintain secure processing environments; failure to patch known vulnerabilities could lead to compliance issues. Given that the attack requires user interaction and some privilege level, the risk is mitigated but still present, particularly in environments with less security awareness or where the speedtest is publicly accessible.

Summary

CVE-2022-4957 is a cross-site scripting (XSS) vulnerability identified in the librespeed speedtest application, specifically affecting versions 5.2.0 through 5.2.4. The vulnerability resides in the results/stats.php file, where improper sanitization of the 'id' parameter allows an attacker to inject malicious scripts. This vulnerability is classified under CWE-79, which pertains to improper neutralization of input during web page generation, leading to XSS attacks. An attacker can exploit this remotely by manipulating the 'id' argument in HTTP requests to execute arbitrary JavaScript in the context of the victim's browser. The vulnerability requires low privileges (PR:L) and user interaction (UI:R), meaning the attacker must trick a user into clicking a crafted link or visiting a malicious page. The CVSS 3.1 base score is 3.5, indicating a low severity primarily due to the limited impact on confidentiality and availability, and the requirement for user interaction and privileges. The integrity impact is low, as the attacker can execute scripts but cannot directly alter server-side data. No known exploits are currently reported in the wild. The issue is addressed in version 5.2.5 of librespeed speedtest, with a patch identified by commit a85f2c086f3449dffa8fe2edb5e2ef3ee72dc0e9. Organizations using affected versions should upgrade promptly to mitigate this risk.

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

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 3 Jul 2025, 17:43 UTC

WeaknessesCWE-79

Technical details

References

Community reviews

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