MediaWiki before 1.19.24, 1.2x before 1.23.9, and 1.24.x before 1.24.2, when using HHVM, allows remote attackers to cause a denial of service (CPU and memory consumption) via a large number of nested entity references in an (1) SVG file or (2) XMP metadata in a PDF file, aka a "billion laughs attack," a different vulnerability than CVE-2015-2937
Published Apr 13, 2015
7.1
HIGHCVSS 2.0
EPSS 2.81%
Description
MediaWiki before 1.19.24, 1.2x before 1.23.9, and 1.24.x before 1.24.2, when using HHVM, allows remote attackers to cause a denial of service (CPU and memory consumption) via a large number of nested entity references in an (1) SVG file or (2) XMP metadata in a PDF file, aka a "billion laughs attack," a different vulnerability than CVE-2015-2937.
Affected products
No data.
- ≤ 1.19.23
- 1.20
- 1.20.1
- 1.20.2
- 1.20.3
- 1.20.4
- 1.20.5
- 1.20.6
- 1.20.7
- 1.20.8
- 1.21
- 1.21.1
- 1.21.2
- 1.21.3
- 1.21.4
- 1.21.5
- 1.21.6
- 1.21.7
- 1.21.8
- 1.21.9
- 1.21.10
- 1.21.11
- 1.22.0
- 1.22.1
- 1.22.2
- 1.22.3
- 1.22.4
- 1.22.5
- 1.22.6
- 1.22.7
- 1.22.8
- 1.22.9
- 1.22.10
- 1.22.11
- 1.22.12
- 1.22.13
- 1.22.14
- 1.22.15
- 1.23.0
- 1.23.1
- 1.23.2
- 1.23.3
- 1.23.4
- 1.23.5
- 1.23.6
- 1.23.7
- 1.23.8
- 1.24.0
- 1.24.1
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.81% (0.02814) | 86.04th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.83% (0.02834) | 84.75th | v5 (v2026.06.15) |
| Jul 30, 2025 | 2.53% (0.02526) | 84.82th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.50% (0.01504) | 79.86th | v4 (v2025.03.14) |
| Dec 12, 2024 | 2.69% (0.02685) | 90.82th | v3 (v2023.03.01) |
| Mar 7, 2023 | 3.26% (0.03263) | 89.74th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
References (6)
- http://www.openwall.com/lists/oss-security/2015/04/01/1 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2015/04/07/3 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/73477 vdb-entryx_refsource_BID
- https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-March/000175.html mailing-listx_refsource_MLISTPatchVendor Advisory
- https://phabricator.wikimedia.org/T85848 x_refsource_CONFIRMExploit
- https://security.gentoo.org/glsa/201510-05 vendor-advisoryx_refsource_GENTOO
| Link | Providers | Tags |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2015/04/01/1 | mailing-listx_refsource_MLIST | |
| http://www.openwall.com/lists/oss-security/2015/04/07/3 | mailing-listx_refsource_MLIST | |
| http://www.securityfocus.com/bid/73477 | vdb-entryx_refsource_BID | |
| https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-March/000175.html | mailing-listx_refsource_MLISTPatchVendor Advisory | |
| https://phabricator.wikimedia.org/T85848 | x_refsource_CONFIRMExploit | |
| https://security.gentoo.org/glsa/201510-05 | vendor-advisoryx_refsource_GENTOO |
Change history (0)
No recorded changes yet.