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Vulnerability details: VCID-b39s-p49p-1ydn
Vulnerability ID VCID-b39s-p49p-1ydn
Aliases CVE-2013-4303
Summary includes/libs/IEUrlExtension.php in the MediaWiki API in MediaWiki 1.19.x before 1.19.8, 1.20.x before 1.20.7, and 1.21.x before 1.21.2 does not properly detect extensions when there are an even number of "." (period) characters in a string, which allows remote attackers to conduct cross-site scripting (XSS) attacks via the siprop parameter in a query action to wiki/api.php.
Status Published
Exploitability 0.5
Weighted Severity 5.5
Risk 2.8
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
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
epss 0.00604 https://api.first.org/data/v1/epss?cve=CVE-2013-4303
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2013-4303
cvssv3.1 6.1 https://nvd.nist.gov/vuln/detail/CVE-2013-4303
Reference id Reference type URL
http://lists.wikimedia.org/pipermail/mediawiki-announce/2013-September/000133.html
https://api.first.org/data/v1/epss?cve=CVE-2013-4303
https://bugzilla.wikimedia.org/show_bug.cgi?id=52746
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4303
http://seclists.org/oss-sec/2013/q3/553
https://exchange.xforce.ibmcloud.com/vulnerabilities/86897
http://www.securityfocus.com/bid/62194
cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
CVE-2013-4303 https://nvd.nist.gov/vuln/detail/CVE-2013-4303
No exploits are available.
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2013-4303
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2013-4303
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
Exploit Prediction Scoring System (EPSS)
Percentile 0.68626
EPSS Score 0.00604
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T11:47:12.055102+00:00 EPSS Importer Import https://epss.cyentia.com/epss_scores-current.csv.gz 37.0.0