CVE-2017-8811
The implementation of raw message parameter expansion in MediaWiki before 1.27.4, 1.28.x before 1...
The implementation of raw message parameter expansion in MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 allows HTML mangling attacks.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
The implementation of raw message parameter expansion in MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 allows HTML mangling attacks.
- Record
CVE-2017-8811- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:N/I:P/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
CVE List No score
The implementation of raw message parameter expansion in MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 allows HTML mangling attacks.
- Record
CVE-2017-8811- Updated
- 2026-11-02
EUVDEUVD-2017-17754 No score
The implementation of raw message parameter expansion in MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 allows HTML mangling attacks.
- Record
EUVD-2017-17754- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6mj9-2x5g-w3f6
The implementation of raw message parameter expansion in MediaWiki before 1.27.4, 1.28.x before 1...
The implementation of raw message parameter expansion in MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 allows HTML mangling attacks.
- Record
GHSA-6mj9-2x5g-w3f6- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
OSV
The implementation of raw message parameter expansion in MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 allows HTML mangling attacks.
- Record
CVE-2017-8811- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2017-8811
The implementation of raw message parameter expansion in MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 allows HTML mangling attacks.
- Record
DEBIAN-CVE-2017-8811- CVSS 3.0
- 6.1 Medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Updated
- 2026-11-02
OSVMGASA-2017-0429 No score
Updated mediawiki packages fix security vulnerabilities
XSS when $wgShowExceptionDetails = false and browser sends non-standard url escaping (CVE-2017-8808).
Reflected File Download from api.php (CVE-2017-8809).
On private wikis, login form shouldn't distinguish between login failure due to bad username and bad password (CVE-2017-8810).
It's possible to mangle HTML via raw message parameter expansion (CVE-2017-8811).
The id attribute on headlines allow raw > (CVE-2017-8812).
Language converter can be tricked into replacing text inside tags by adding a lot of junk after the rule definition (CVE-2017-8814).
Language converter: unsafe attribute injection via glossary rules (CVE-2017-8815).
composer.json has require-dev versions of PHPUnit with known security issues (CVE-2017-9841).
Note that MediaWiki 1.23.x on Mageia 5 is no longer supported. Those using the mediawiki package on Mageia 5 should upgrade to Mageia 6.
- Record
MGASA-2017-0429- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
mediawikiDebian:12 |
before 1:1.27.4-1 | 1:1.27.4-1 |
mediawikiDebian:13 |
before 1:1.27.4-1 | 1:1.27.4-1 |
mediawikiDebian:14 |
before 1:1.27.4-1 | 1:1.27.4-1 |
mediawikiDebian:9 From an advisory covering 7 CVEs |
before 1:1.27.4-1~deb9u1, plus listed versions 1:1.27.3-11:1.27.4-1~bpo8+1 |
1:1.27.4-1~deb9u1 |
mediawikiMageia:6 From an advisory covering 8 CVEs |
before 1.27.4-1.mga6 | 1.27.4-1.mga6 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2017-8811 is a medium vulnerability (CVSS 6.1) in Mediawiki, published November 15, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.04%, the 64th percentile. Fixed in mediawiki 1:1.27.4-1.
References
securitytracker.com/id/1039812
lists.wikimedia.org/pipermail/mediawiki-announce/2017-November/000216.html
debian.org/security/2017/dsa-4036
nvd.nist.gov/vuln/detail/CVE-2017-8811
github.com/advisories/GHSA-6mj9-2x5g-w3f6
security-tracker.debian.org/tracker/CVE-2017-8811
advisories.mageia.org/MGASA-2017-0429.html
bugs.mageia.org/show_bug.cgi?id=22038