What is CVE-2026-103437?

CVE-2026-103437 is a vulnerability in The Wikimedia Foundation MediaWiki Readinglists Extension, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). Published 2026-09-30.

Is CVE-2026-103437 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in The Wikimedia Foundation MediaWiki Readinglists Extension

CVE-2026-103437

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki ReadingLists extension allows Reflected XSS. This issue affects MediaWiki ReadingLists extension: 1.46 and 1.45.

Published 2026-09-30 · last modified 2026-09-30.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

The Wikimedia Foundation MediaWiki Readinglists Extension — versions 1.45, 1.46

Weakness classification (CWE)

CWE-80 — Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

Public proof-of-concept exploits

BomboBombone/CVE-2026-103437

References

Frequently asked questions

What is CVE-2026-103437?: CVE-2026-103437 is a vulnerability in The Wikimedia Foundation MediaWiki Readinglists Extension, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). Published 2026-09-30.
Is CVE-2026-103437 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.