Is CVE-2011-1587 being actively exploited?

CVE-2011-1587 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2011-1587?

CVE-2011-1587 has a CVSS 2.0 base score of 4.3 (MEDIUM).

CVE-2011-1587

MEDIUM · CVSS 4.3EPSS 1.7%EU EUVD

Cross-site scripting (XSS) vulnerability in MediaWiki before 1.16.4, when Internet Explorer 6 or earlier is used, allows remote attackers to inject arbitrary web script or HTML via an uploaded file accessed with a dangerous extension such as .html located before a ? (question mark) in a query string, in conjunction with a modified URI path that has a %2E sequence in place of the . (dot) character. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-1578.

Key facts

CVSS score: 4.3 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness (CWE): CWE-79
EPSS score: 1.7% (77th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-1587)
Published: April 27, 2011
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-1587 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki
mediawiki / mediawiki

and 90 more…

References

http://lists.wikimedia.org/pipermail/mediawiki-announce/2011-April/000097.html(Patch, Vendor Advisory)
http://openwall.com/lists/oss-security/2011/04/18/5(Patch)
http://www.debian.org/security/2011/dsa-2366
https://bugzilla.redhat.com/show_bug.cgi?id=696360(Patch)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain