5.8

CVE-2022-20784: cisco cisco web security appliance (wsa) Improper Input Validation

CVSS: 5.8v3.1MediumModified
Published 06-04-2022Last modified 06-11-2024
Open JSON

Vulnerability summary

CVE-2022-20784 is a medium (CVSS 5.8) Improper Input Validation vulnerability in cisco cisco web security appliance (wsa). EPSS estimates a 0.93% chance of exploitation in the next 30 days, higher than 60.1% of scored vulnerabilities.

Overall risk
23/100
0100
Low · default modelHow is this calculated?
CVSS score
5.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.93%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 06-04-2022
    PublishedVulnerability first disclosed.
  2. 06-11-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability in the Web-Based Reputation Score (WBRS) engine of Cisco AsyncOS Software for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to bypass established web request policies and access blocked content on an affected device. This vulnerability is due to incorrect handling of certain character combinations inserted into a URL. An attacker could exploit this vulnerability by sending crafted URLs to be processed by an affected device. A successful exploit could allow the attacker to bypass the web proxy and access web content that has been blocked by policy.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.93%

Chance of exploitation in the next 30 days

Percentile

60%

Versus all other CVEs

30-day change

0.00 pp

From 0.93% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.93%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco2 products

1 vendor · 2 products

References

1 links