CVE-2023-5560

WP-UserOnline < 2.88.3 - Unauthenticated Stored XSS

View on CVE.org

Published Nov 27, 2023 CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed

Description

The WP-UserOnline WordPress plugin before 2.88.3 does not sanitise and escape the X-Forwarded-For header before outputting its content on the page, which allows unauthenticated users to perform Cross-Site Scripting attacks.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Unknown

WP-UserOnline

unaffected

Version	Status	Constraints
`0`	affected	< 2.88.3

Configuration 1 [-]

cpe:2.3:a:lesterchan:wp-useronline:*:*:*:*:*:wordpress:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2023-57860	The WP-UserOnline WordPress plugin before 2.88.3 does not sanitise and escape the X-Forwarded-For header before outputting its content on the page, which allows unauthenticated users to perform Cross-Site Scripting attacks.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.510% probability within 30 days)

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
https://wpscan.com/vulnerability/55d23184-fc5a-4090-b079-142407b59b05

History

Nov 22, 2024 8:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Subscriptions

Lesterchan Wp-useronline

Weaknesses

CWE-79

Sources

CVE record Updated: Nov 21, 2024, 7:17 PM

Status: PUBLISHED
Assigner: WPScan
Published: Nov 27, 2023, 4:22 PM
Updated: Nov 21, 2024, 7:17 PM
Reserved: Oct 12, 2023, 3:08 PM

View source JSON

Vulnrichment Updated: Aug 2, 2024, 7:59 AM

Updated: Aug 2, 2024, 7:59 AM

NVD Updated: Jun 17, 2026, 6:48 AM

Status: Modified
Published: Nov 27, 2023, 5:15 PM
Modified: Jun 17, 2026, 6:48 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2023-5560", "assignerOrgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81", "state": "PUBLISHED", "assignerShortName": "WPScan", "dateReserved": "2023-10-12T15:08:01.136Z", "datePublished": "2023-11-27T16:22:00.142Z", "dateUpdated": "2024-11-21T19:17:14.770Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81", "shortName": "WPScan", "dateUpdated": "2023-11-27T16:22:00.142Z"}, "title": "WP-UserOnline < 2.88.3 - Unauthenticated Stored XSS", "problemTypes": [{"descriptions": [{"description": "CWE-79 Cross-Site Scripting (XSS)", "lang": "en", "type": "CWE"}]}], "affected": [{"vendor": "Unknown", "product": "WP-UserOnline", "versions": [{"status": "affected", "versionType": "semver", "version": "0", "lessThan": "2.88.3"}], "defaultStatus": "unaffected", "collectionURL": "https://wordpress.org/plugins"}], "descriptions": [{"lang": "en", "value": "The WP-UserOnline WordPress plugin before 2.88.3 does not sanitise and escape the X-Forwarded-For header before outputting its content on the page, which allows unauthenticated users to perform Cross-Site Scripting attacks."}], "references": [{"url": "https://wpscan.com/vulnerability/55d23184-fc5a-4090-b079-142407b59b05", "tags": ["exploit", "vdb-entry", "technical-description"]}], "credits": [{"lang": "en", "value": "Krzysztof Zaj\u0105c (CERT PL)", "type": "finder"}, {"lang": "en", "value": "WPScan", "type": "coordinator"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "WPScan CVE Generator"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T07:59:44.715Z"}, "title": "CVE Program Container", "references": [{"url": "https://wpscan.com/vulnerability/55d23184-fc5a-4090-b079-142407b59b05", "tags": ["exploit", "vdb-entry", "technical-description", "x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-11-21T19:17:04.606636Z", "id": "CVE-2023-5560", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-11-21T19:17:14.770Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://wpscan.com/vulnerability/55d23184-fc5a-4090-b079-142407b59b05", "tags": ["exploit", "vdb-entry", "technical-description", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T07:59:44.715Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-5560", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-11-21T19:17:04.606636Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-11-21T19:17:10.024Z"}}], "cna": {"title": "WP-UserOnline < 2.88.3 - Unauthenticated Stored XSS", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "Krzysztof Zaj\u0105c (CERT PL)"}, {"lang": "en", "type": "coordinator", "value": "WPScan"}], "affected": [{"vendor": "Unknown", "product": "WP-UserOnline", "versions": [{"status": "affected", "version": "0", "lessThan": "2.88.3", "versionType": "semver"}], "collectionURL": "https://wordpress.org/plugins", "defaultStatus": "unaffected"}], "references": [{"url": "https://wpscan.com/vulnerability/55d23184-fc5a-4090-b079-142407b59b05", "tags": ["exploit", "vdb-entry", "technical-description"]}], "x_generator": {"engine": "WPScan CVE Generator"}, "descriptions": [{"lang": "en", "value": "The WP-UserOnline WordPress plugin before 2.88.3 does not sanitise and escape the X-Forwarded-For header before outputting its content on the page, which allows unauthenticated users to perform Cross-Site Scripting attacks."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "description": "CWE-79 Cross-Site Scripting (XSS)"}]}], "providerMetadata": {"orgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81", "shortName": "WPScan", "dateUpdated": "2023-11-27T16:22:00.142Z"}}}, "cveMetadata": {"cveId": "CVE-2023-5560", "state": "PUBLISHED", "dateUpdated": "2024-11-21T19:17:14.770Z", "dateReserved": "2023-10-12T15:08:01.136Z", "assignerOrgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81", "datePublished": "2023-11-27T16:22:00.142Z", "assignerShortName": "WPScan"}, "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"collectionURL": "https://wordpress.org/plugins", "defaultStatus": "unaffected", "product": "WP-UserOnline", "vendor": "Unknown", "versions": [{"lessThan": "2.88.3", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "contact@wpscan.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:lesterchan:wp-useronline:*:*:*:*:*:wordpress:*:*", "matchCriteriaId": "B5A0CE27-B2BE-4A49-9A77-D7E6A2148BAD", "versionEndExcluding": "2.88.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The WP-UserOnline WordPress plugin before 2.88.3 does not sanitise and escape the X-Forwarded-For header before outputting its content on the page, which allows unauthenticated users to perform Cross-Site Scripting attacks."}, {"lang": "es", "value": "El complemento WP-UserOnline de WordPress anterior a 2.88.3 no sanitiza ni escapa del encabezado X-Forwarded-For antes de mostrar su contenido en la p\u00e1gina, lo que permite a usuarios no autenticados realizar ataques de Cross Site Scripting."}], "id": "CVE-2023-5560", "lastModified": "2026-06-17T06:48:50.570", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-5560", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-11-21T19:17:04.606636Z", "version": "2.0.3"}}]}, "published": "2023-11-27T17:15:08.980", "references": [{"source": "contact@wpscan.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://wpscan.com/vulnerability/55d23184-fc5a-4090-b079-142407b59b05"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://wpscan.com/vulnerability/55d23184-fc5a-4090-b079-142407b59b05"}], "sourceIdentifier": "contact@wpscan.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "nvd@nist.gov", "type": "Primary"}]}