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Vulnerability details: VCID-6aqu-4zcv-jfdx
Vulnerability ID VCID-6aqu-4zcv-jfdx
Aliases CVE-2023-3550
Summary Mediawiki v1.40.0 does not validate namespaces used in XML files. Therefore, if the instance administrator allows XML file uploads, a remote attacker with a low-privileged user account can use this exploit to become an administrator by sending a malicious link to the instance administrator.
Status Published
Exploitability 0.5
Weighted Severity 6.6
Risk 3.3
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
System Score Found at
cvssv3 7.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-3550.json
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.00107 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
epss 0.0011 https://api.first.org/data/v1/epss?cve=CVE-2023-3550
cvssv3.1 7.3 https://fluidattacks.com/advisories/blondie/
ssvc Track* https://fluidattacks.com/advisories/blondie/
cvssv3.1 7.3 https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html
ssvc Track* https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html
cvssv3.1 7.3 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
ssvc Track* https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
cvssv3.1 7.3 https://www.debian.org/security/2023/dsa-5520
ssvc Track* https://www.debian.org/security/2023/dsa-5520
cvssv3.1 7.3 https://www.mediawiki.org/wiki/MediaWiki/
ssvc Track* https://www.mediawiki.org/wiki/MediaWiki/
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-3550.json
https://api.first.org/data/v1/epss?cve=CVE-2023-3550
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-3550
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45360
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45362
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45363
https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html
https://www.debian.org/security/2023/dsa-5520
2240807 https://bugzilla.redhat.com/show_bug.cgi?id=2240807
blondie https://fluidattacks.com/advisories/blondie/
cpe:2.3:a:mediawiki:mediawiki:1.40.0:-:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mediawiki:mediawiki:1.40.0:-:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
CVE-2023-3550 https://nvd.nist.gov/vuln/detail/CVE-2023-3550
FU2FGUXXK6TMV6R52VRECLC6XCSQQISY https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
MediaWiki https://www.mediawiki.org/wiki/MediaWiki/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-3550.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N Found at https://fluidattacks.com/advisories/blondie/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-09-24T15:57:17Z/ Found at https://fluidattacks.com/advisories/blondie/
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N Found at https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-09-24T15:57:17Z/ Found at https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N Found at https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-09-24T15:57:17Z/ Found at https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N Found at https://www.debian.org/security/2023/dsa-5520
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-09-24T15:57:17Z/ Found at https://www.debian.org/security/2023/dsa-5520
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N Found at https://www.mediawiki.org/wiki/MediaWiki/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2024-09-24T15:57:17Z/ Found at https://www.mediawiki.org/wiki/MediaWiki/
Exploit Prediction Scoring System (EPSS)
Percentile 0.29707
EPSS Score 0.00107
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T09:43:54.522879+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2023/3xxx/CVE-2023-3550.json 37.0.0