CVE-2017-8810

MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2, when a private wiki is configured, provides different error messages for failed login attempts depending on whether the username exists, which allows remote attackers to enumerate account names and conduct brute-force attacks via a series of requests.

Published: 2017-11-15 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-8810 is rated Moderate Risk (59/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.15%). EPSS rose +1.14% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2017-8810

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.01% 2.15% +1.14%
2 2025-03-30 1.86% 1.01% -0.85%
3 2025-03-29 — 1.86% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-8810

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2017-8810

OS Trackers for CVE-2017-8810

vendor priority summary link
debian not yet assigned CVE-2017-8810 not yet assigned priority: Debian including 1 source packages (mediawiki), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2017-8810
ubuntu low CVE-2017-8810 low priority: Ubuntu including 1 source packages (mediawiki), 8 status rows across 8 suites (artful, bionic, cosmic, disco, trusty, upstream, xenial, zesty): not-affected 3, DNE 2, ignored 2, released 1. https://ubuntu.com/security/CVE-2017-8810

Affected software / configurations for CVE-2017-8810

Vendor Product Version Raw CPE
mediawiki mediawiki <= 1.27.3 cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
mediawiki mediawiki 1.28.0 cpe:2.3:a:mediawiki:mediawiki:1.28.0:*:*:*:*:*:*:*
mediawiki mediawiki 1.28.1 cpe:2.3:a:mediawiki:mediawiki:1.28.1:*:*:*:*:*:*:*
mediawiki mediawiki 1.28.2 cpe:2.3:a:mediawiki:mediawiki:1.28.2:*:*:*:*:*:*:*
mediawiki mediawiki 1.29.0 cpe:2.3:a:mediawiki:mediawiki:1.29.0:*:*:*:*:*:*:*
mediawiki mediawiki 1.29.1 cpe:2.3:a:mediawiki:mediawiki:1.29.1:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

References for CVE-2017-8810

cvelogic Threat Intelligence