7.5

CVE-2021-31922: pulsesecure virtual_traffic_manager HTTP Request/Response Smuggling

CVSS: 7.5v3.1HighModified
Published 14-05-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-31922 is a high (CVSS 7.5) HTTP Request/Response Smuggling vulnerability in pulsesecure virtual_traffic_manager. EPSS estimates a 0.97% chance of exploitation in the next 30 days, higher than 61.4% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.97%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 14-05-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

An HTTP Request Smuggling vulnerability in Pulse Secure Virtual Traffic Manager before 21.1 could allow an attacker to smuggle an HTTP request through an HTTP/2 Header. This vulnerability is resolved in 21.1, 20.3R1, 20.2R1, 20.1R2, 19.2R4, and 18.2R3.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.97%

Chance of exploitation in the next 30 days

Percentile

61%

Versus all other CVEs

30-day change

0.00 pp

From 0.97% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.97%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (kb.pulsesecure.net)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Pulsesecure1 product
  • virtual_traffic_manager≤ 18.1 | ≥ 18.3, ≤ 19.1 | 18.2 | 18.2:r1 | 19.2 | 19.2:r1 | 19.2:r2 | 19.3 | 20.1 | 20.2 | 20.3

1 vendor · 1 product

References

1 links