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osvGoogleOSV:GHSA-Q65M-PV3F-WR5R
HistoryFeb 24, 2020 - 5:33 p.m.

XSS in Bleach when noscript and raw tag whitelisted

2020-02-2417:33:44
Google
osv.dev
4

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

0.004 Low

EPSS

Percentile

74.1%

JSON

Impact

A mutation XSS affects users calling bleach.clean with noscript and a raw tag (see below) in the allowed/whitelisted tags option.

Patches

v3.1.1

Workarounds

  • modify bleach.clean calls to not whitelist noscript and one or more of the following raw tags:
title
textarea
script
style
noembed
noframes
iframe
xmp

References

Credits

  • Reported by Yaniv Nizry from the CxSCA AppSec group at Checkmarx

For more information

If you have any questions or comments about this advisory:

CPENameOperatorVersion
bleacheq1.0.3
bleacheq2.1.3
bleacheq0.3
bleacheq3.1.0
bleacheq0.1.1
bleacheq1.5.0
bleacheq0.2
bleacheq0.3.3
bleacheq0.5.0
bleacheq1.0.0
Rows per page:
1-10 of 411

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6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

4.3 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:N/I:P/A:N

0.004 Low

EPSS

Percentile

74.1%

JSON
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