PT-2021-3745 · Owasp+1 · Owasp Antisamy+1

Published 2021-07-19 · Updated 2022-10-29 · CVE-2021-35043

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions OWASP AntiSamy versions prior to 1.6.4

Description The issue allows for cross-site scripting (XSS) attacks via HTML attributes when using the HTML output serializer. This was demonstrated by a javascript: URL, where the colon character was replaced. The vulnerability can be exploited by a remote attacker to perform cross-site scripting attacks, potentially allowing them to execute malicious scripts on a user's browser.

Recommendations For OWASP AntiSamy versions prior to 1.6.4, update to version 1.6.4 or later to resolve the issue. As a temporary workaround, consider restricting the use of HTML attributes in the HTML output serializer to minimize the risk of exploitation.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

BDU:2021-03998

CVE-2021-35043

GHSA-9C8W-JRW3-Q2C3

Affected Products

Debian

Owasp Antisamy

References · 19

• https://github.com/nahsra/antisamy/releases/tag/v1.6.4 · Patch
• https://github.com/nahsra/antisamy/pull/87 · Patch
• https://ubuntu.com/security/CVE-2021-35043 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-35043 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-35043 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-35043 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-35043 · Security Note
• https://oracle.com/security-alerts/cpujan2022.html · Patch
• https://osv.dev/vulnerability/GHSA-9c8w-jrw3-q2c3 · Vendor Advisory
• https://oracle.com/security-alerts/cpuoct2021.html · Patch
• https://oracle.com/security-alerts/cpuapr2022.html · Patch
• https://oracle.com/security-alerts/cpujul2022.html · Patch
• https://bdu.fstec.ru/vul/2021-03998 · Security Note
• https://osv.dev/vulnerability/CVE-2021-35043 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-35043 · Vendor Advisory