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2 vulnerabilities found for Mediawiki - WikiSEO Extension by Wikimedia Foundation
CVE-2026-100243 (GCVE-0-2026-100243)
Vulnerability from nvd – Published: 2026-09-29 16:43 – Updated: 2026-09-30 20:45
VLAI
EPSS
VEX
Title
Stored XSS in WikiSEO author and image properties on action=info
Summary
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - WikiSEO Extension allows Stored XSS.
This issue affects Mediawiki - WikiSEO Extension: from * before 1.46.1, 1.45.5, 1.43.10.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 20:44 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | Mediawiki - WikiSEO Extension |
Affected:
* , < 1.46.1, 1.45.5, 1.43.10
(semver)
|
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"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"
}
},
{
"other": {
"content": {
"id": "CVE-2026-100243",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-30T20:44:39.532343Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-30T20:45:04.917Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Mediawiki - WikiSEO Extension",
"repo": "https://gerrit.wikimedia.org/g/mediawiki/extensions/WikiSEO/+/refs/heads/master",
"vendor": "Wikimedia Foundation",
"versions": [
{
"lessThan": "1.46.1, 1.45.5, 1.43.10",
"status": "affected",
"version": "*",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Andmcadams"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027) vulnerability in Wikimedia Foundation Mediawiki - WikiSEO Extension allows Stored XSS.\u003cp\u003eThis issue affects Mediawiki - WikiSEO Extension: from * before 1.46.1, 1.45.5, 1.43.10.\u003c/p\u003e"
}
],
"value": "Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027) vulnerability in Wikimedia Foundation Mediawiki - WikiSEO Extension allows Stored XSS.\n\nThis issue affects Mediawiki - WikiSEO Extension: from * before 1.46.1, 1.45.5, 1.43.10."
}
],
"impacts": [
{
"capecId": "CAPEC-592",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-592 Stored XSS"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-29T16:43:00.209Z",
"orgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
"shortName": "wikimedia-foundation"
},
"references": [
{
"url": "https://phabricator.wikimedia.org/T430896"
},
{
"url": "https://gerrit.wikimedia.org/r/q/Iff6ef320017649750e5c6723a91ee298eb97a408"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Stored XSS in WikiSEO author and image properties on action=info",
"x_generator": {
"engine": "Vulnogram 1.0.2"
}
}
},
"cveMetadata": {
"assignerOrgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
"assignerShortName": "wikimedia-foundation",
"cveId": "CVE-2026-100243",
"datePublished": "2026-09-29T16:43:00.209Z",
"dateReserved": "2026-09-25T16:03:13.124Z",
"dateUpdated": "2026-09-30T20:45:04.917Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-100243 (GCVE-0-2026-100243)
Vulnerability from cvelistv5 – Published: 2026-09-29 16:43 – Updated: 2026-09-30 20:45
VLAI
EPSS
VEX
Title
Stored XSS in WikiSEO author and image properties on action=info
Summary
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - WikiSEO Extension allows Stored XSS.
This issue affects Mediawiki - WikiSEO Extension: from * before 1.46.1, 1.45.5, 1.43.10.
Severity
6.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 20:44 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wikimedia Foundation | Mediawiki - WikiSEO Extension |
Affected:
* , < 1.46.1, 1.45.5, 1.43.10
(semver)
|
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"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"
}
},
{
"other": {
"content": {
"id": "CVE-2026-100243",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-30T20:44:39.532343Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-30T20:45:04.917Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Mediawiki - WikiSEO Extension",
"repo": "https://gerrit.wikimedia.org/g/mediawiki/extensions/WikiSEO/+/refs/heads/master",
"vendor": "Wikimedia Foundation",
"versions": [
{
"lessThan": "1.46.1, 1.45.5, 1.43.10",
"status": "affected",
"version": "*",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Andmcadams"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027) vulnerability in Wikimedia Foundation Mediawiki - WikiSEO Extension allows Stored XSS.\u003cp\u003eThis issue affects Mediawiki - WikiSEO Extension: from * before 1.46.1, 1.45.5, 1.43.10.\u003c/p\u003e"
}
],
"value": "Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027) vulnerability in Wikimedia Foundation Mediawiki - WikiSEO Extension allows Stored XSS.\n\nThis issue affects Mediawiki - WikiSEO Extension: from * before 1.46.1, 1.45.5, 1.43.10."
}
],
"impacts": [
{
"capecId": "CAPEC-592",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-592 Stored XSS"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-29T16:43:00.209Z",
"orgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
"shortName": "wikimedia-foundation"
},
"references": [
{
"url": "https://phabricator.wikimedia.org/T430896"
},
{
"url": "https://gerrit.wikimedia.org/r/q/Iff6ef320017649750e5c6723a91ee298eb97a408"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Stored XSS in WikiSEO author and image properties on action=info",
"x_generator": {
"engine": "Vulnogram 1.0.2"
}
}
},
"cveMetadata": {
"assignerOrgId": "c4f26cc8-17ff-4c99-b5e2-38fc1793eacc",
"assignerShortName": "wikimedia-foundation",
"cveId": "CVE-2026-100243",
"datePublished": "2026-09-29T16:43:00.209Z",
"dateReserved": "2026-09-25T16:03:13.124Z",
"dateUpdated": "2026-09-30T20:45:04.917Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}