[NEW] [high] MediaWiki and Extensions: Multiple vulnerabilities

highCVE-2026-58031 CVE-2026-58035 CVE-2026-58520 CVE-2026-14363 CVE-2026-58521 CVE-2026-58517

An attacker can exploit multiple vulnerabilities in MediaWiki to conduct Cross-Site Scripting attacks, redirect users to malicious websites, bypass authentication, or perform SQL injection attacks.

CSIRTS triage

vendor: MediaWiki product: MediaWiki Cross-site scripting Authentication bypass SQL injectionOther

What: An attacker can exploit multiple vulnerabilities in MediaWiki to conduct Cross-Site Scripting attacks and SQL injection.
Who is affected: Deployments of MediaWiki and its extensions are affected.
Urgency: Remediation is urgent due to the high severity and potential for data manipulation.
Action: Update to the latest version of MediaWiki.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: high
Published: 2026-07-02
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2170

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-580310.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all scored CVEs.
Low exploitation riskCVE-2026-580350.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all scored CVEs.
Low exploitation riskCVE-2026-585200.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all scored CVEs.
Low exploitation riskCVE-2026-143630.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 21% of all scored CVEs.
Low exploitation riskCVE-2026-585210.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all scored CVEs.
Low exploitation riskCVE-2026-585170.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all scored CVEs.
Low exploitation riskCVE-2026-143580.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-58031	coverage & exploitation status	NVD · CVE.org
CVE-2026-58035	coverage & exploitation status	NVD · CVE.org
CVE-2026-58520	coverage & exploitation status	NVD · CVE.org
CVE-2026-14363	coverage & exploitation status	NVD · CVE.org
CVE-2026-58521	coverage & exploitation status	NVD · CVE.org
CVE-2026-58517	coverage & exploitation status	NVD · CVE.org
CVE-2026-14358	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for MediaWiki and Extensions

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

criticalCVE-2026-14363: Improper neutralization of special elements used in an SQL command ('SQL injection') vulnerabi…nvd · 2026-07-01
unknownCVE-2026-58517: Improper neutralization of input terminators vulnerability in The Wikimedia Foundation Mediawi…nvd · 2026-07-01
unknownCVE-2026-14358: Improper neutralization of input during web page generation ('cross-site scripting') vulnerabi…nvd · 2026-07-01
criticalCVE-2026-58521: Improper neutralization of special elements used in an SQL command ('SQL injection') vulnerabi…nvd · 2026-07-01
unknownCVE-2026-58520: URL redirection to untrusted site ('open redirect') vulnerability in The Wikimedia Foundation …nvd · 2026-07-01
mediumCVE-2026-58519: Improper neutralization of input during web page generation ('cross-site scripting') vulnerabi…nvd · 2026-07-01