CVE-2023-2582Public exploitNetwork attack vector

Reflected XSS via URL-fragment prototype pollution

Published May 8, 2023 · Updated Jan 28, 2025

Prototype pollution in all versions of Strikingly CMS allows remote attackers to execute JavaScript in a victim's browser via a crafted link. Its JavaScript library parses URL fragments while permitting proto and constructor access, allowing crafted values to modify Object.prototype. Exploitation requires a victim to follow the link and an embedded gadget such as jQuery; the resulting script runs in that site's browser context.

CVSS severity6.1
Medium
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Prototype pollution in all versions of Strikingly CMS allows remote attackers to execute JavaScript in a victim's browser via a crafted link. Its JavaScript library parses URL fragments while permitting proto and constructor access, allowing crafted values to modify Object.prototype. Exploitation requires a victim to follow the link and an embedded gadget such as jQuery; the resulting script runs in that site's browser context.

The record

CVE
CVE-2023-2582
Published
May 8, 2023
Updated
Jan 28, 2025
Vendor
Strikingly
Product
Strikingly CMS
Classifications
CWE-1321, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Strikingly · Strikingly CMSversion=All versions

Published CVSS scores

6.1CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1TenableCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.0TenableCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:F/RL:U/RC:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
T1189Drive-by Compromise

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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