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01 Record

CVE-2024-47845

CSS sanitizer used incorrectly, and is easily bypassed

MediumPUBLISHEDCNA: wikimedia-foundation
CNA base score6.9 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
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02 Description

CSS sanitizer used incorrectly, and is easily bypassed

03 Exploitation and scoring

Exploitation
Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
SSVC decision
  • ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.40% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 34.7% of scored records. A rank, not a probability.
NVD base score
6.9 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD analysis status
Analyzed. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2024-10-05 00:09Z2 YR AGO
Last updated
2024-10-07 17:39Z2 YR AGO
Reserved
2024-10-03
Assigning CNA
wikimedia-foundation
Record state
PUBLISHED
Severity
Medium (CVSS 6.9)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Weaknesses
  • CWE-116Improper Encoding or Escaping of OutputClass
Data version
5.1
Document digest
ab38b38216167649852db801d7a13b199a38a878b66a081d4d3bfc05de8e7bc7

05 Affected products

VendorProductVersionsPlatforms
The Wikimedia FoundationMediawiki - CSS Extension1.39.x to < 1.39.9, 1.41.x to < 1.41.3, 1.42.x to < 1.42.2—
wikimediamediawiki-extensions-css1.39.0 to < 1.39.9, 1.41.0 to < 1.41.3, 1.42.0 to < 1.42.2—

06 References