9.8

CVE-2021-42761: fortinet fortiweb Session Fixation

CVSS: 9.8v3.1CriticalModified
Published 16-02-2023Last modified 23-10-2024
Open JSON

Vulnerability summary

CVE-2021-42761 is a critical (CVSS 9.8) Session Fixation vulnerability in fortinet fortiweb. EPSS estimates a 1.47% chance of exploitation in the next 30 days, higher than 73.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
1.47%
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. 16-02-2023
    PublishedVulnerability first disclosed.
  2. 23-10-2024
    Last modifiedVulnerability information updated.

Description

A condition for session fixation vulnerability [CWE-384] in the session management of FortiWeb versions 6.4 all versions, 6.3.0 through 6.3.16, 6.2.0 through 6.2.6, 6.1.0 through 6.1.2, 6.0.0 through 6.0.7, 5.9.0 through 5.9.1 may allow a remote, unauthenticated attacker to infer the session identifier of other users and possibly usurp their session.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

1.47%

Chance of exploitation in the next 30 days

Percentile

73%

Versus all other CVEs

30-day change

0.00 pp

From 1.47% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.47%

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

Fortinet1 product
  • fortiweb≥ 6.4.0, ≤ 6.4.2 | ≥ 6.3.0, ≤ 6.3.16 | ≥ 6.2.0, ≤ 6.2.6 | ≥ 6.1.0, ≤ 6.1.2 | ≥ 6.0.0, ≤ 6.0.7 | ≥ 5.9.0, ≤ 5.9.1 | ≥ 5.8.5, ≤ 5.8.7 | ≥ 5.8.0, ≤ 5.8.3 | ≥ 5.7.0, ≤ 5.7.3 | ≥ 5.6.0, ≤ 5.6.2 | ≥ 5.6.0, < 5.9.2 | ≥ 6.0.0, < 6.0.8 | ≥ 6.1.0, < 6.1.3 | ≥ 6.2.0, < 6.2.7 | ≥ 6.3.0, < 6.3.17 | ≥ 6.4.0, < 7.0.0

1 vendor · 1 product

References

1 links