UpHeron
All vulnerabilities

Servers and applications

CVE-2011-1766

includes/User.php in MediaWiki before 1.16.5, when wgBlockDisablesLogin is enabled, does not clear certain cached data after verification of an auth token fails, which allows remote attackers to bypass authentication by creating crafted wikiUserID and wikiUserName cookies, or by leveraging an unattended workstation.

Severity
Medium 5.8
Published
23 May 2011
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
2.2% in the next 30 daysHigher than 83% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Improper authentication (CWE-287)
Attack
Over the network · No login needed
Attacker can
Read some data · Change some data
CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:N
Sources
NVD

Affected software

SoftwareAffected versions
MediaWikiServers and applications · cpe:a:mediawiki:mediawiki
  • Version 1.16.3
  • Version 1.16.2
  • Version 1.16.1
  • Version 1.16.0
All 135 release lines
  • Every version up to 1.16.4
  • Version 1.1.0
  • Version 1.2.0
  • Version 1.2.1
  • Version 1.2.2
  • Version 1.2.3
  • Version 1.2.4
  • Version 1.2.5
  • Version 1.2.6
  • Version 1.3
  • Version 1.3.1
  • Version 1.3.2
  • Version 1.3.3
  • Version 1.3.4
  • Version 1.3.5
  • Version 1.3.6
  • Version 1.3.7
  • Version 1.3.8
  • Version 1.3.9
  • Version 1.3.10
  • Version 1.3.11
  • Version 1.3.12
  • Version 1.3.13
  • Version 1.3.14
  • Version 1.3.15
  • Version 1.4-beta1
  • Version 1.4-beta2
  • Version 1.4-beta3
  • Version 1.4-beta4
  • Version 1.4-beta5
  • Version 1.4-beta6
  • Version 1.4.0
  • Version 1.4.1
  • Version 1.4.2
  • Version 1.4.3
  • Version 1.4.4
  • Version 1.4.5
  • Version 1.4.6
  • Version 1.4.7
  • Version 1.4.8
  • Version 1.4.9
  • Version 1.4.10
  • Version 1.4.11
  • Version 1.4.12
  • Version 1.4.13
  • Version 1.4.14
  • Version 1.5-alpha1
  • Version 1.5-alpha2
  • Version 1.5-beta1
  • Version 1.5-beta2
  • Version 1.5-beta3
  • Version 1.5-beta4
  • Version 1.5-rc2
  • Version 1.5-rc3
  • Version 1.5-rc4
  • Version 1.5.0
  • Version 1.5.1
  • Version 1.5.2
  • Version 1.5.3
  • Version 1.5.4
  • Version 1.5.5
  • Version 1.5.6
  • Version 1.5.7
  • Version 1.5.8
  • Version 1.6.0
  • Version 1.6.1
  • Version 1.6.2
  • Version 1.6.3
  • Version 1.6.4
  • Version 1.6.5
  • Version 1.6.6
  • Version 1.6.7
  • Version 1.6.8
  • Version 1.6.9
  • Version 1.6.10
  • Version 1.6.11
  • Version 1.6.12
  • Version 1.7.0
  • Version 1.7.1
  • Version 1.7.2
  • Version 1.7.3
  • Version 1.8.0
  • Version 1.8.1
  • Version 1.8.2
  • Version 1.8.3
  • Version 1.8.4
  • Version 1.8.5
  • Version 1.9.0-rc2
  • Version 1.9.0
  • Version 1.9.1
  • Version 1.9.2
  • Version 1.9.3
  • Version 1.9.4
  • Version 1.9.5
  • Version 1.9.6
  • Version 1.10.0-rc1
  • Version 1.10.0-rc2
  • Version 1.10.0
  • Version 1.10.1
  • Version 1.10.2
  • Version 1.10.3
  • Version 1.10.4
  • Version 1.11.0-rc1
  • Version 1.11
  • Version 1.11.1
  • Version 1.11.2
  • Version 1.12.0-rc1
  • Version 1.12.0
  • Version 1.12.1
  • Version 1.12.2
  • Version 1.12.3
  • Version 1.12.4
  • Version 1.13.0-rc1
  • Version 1.13.0-rc2
  • Version 1.13.0
  • Version 1.13.1
  • Version 1.13.2
  • Version 1.13.3
  • Version 1.13.4
  • Version 1.14.0-rc1
  • Version 1.14.0
  • Version 1.14.1
  • Version 1.15.0-rc1
  • Version 1.15.0
  • Version 1.15.1
  • Version 1.15.2
  • Version 1.15.3
  • Version 1.15.4
  • Version 1.15.5
  • Version 1.16.0-beta1
  • Version 1.16.0-beta2
  • Version 1.16.0
  • Version 1.16.1
  • Version 1.16.2
  • Version 1.16.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2011-1766
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2011-1766