CVE-2020-1998 — PAN-OS: Improper SAML SSO authorization of shared local users

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HIGH

PAN-OS: Improper SAML SSO authorization of shared local users

Published May 13, 2020

8.8

HIGH

CVSS 3.1

EPSS 0.89%

Description

An improper authorization vulnerability in PAN-OS that mistakenly uses the permissions of local linux users instead of the intended SAML permissions of the account when the username is shared for the purposes of SSO authentication. This can result in authentication bypass and unintended resource access for the user. This issue affects: PAN-OS 7.1 versions earlier than 7.1.26; PAN-OS 8.1 versions earlier than 8.1.13; PAN-OS 9.0 versions earlier than 9.0.6; PAN-OS 9.1 versions earlier than 9.1.1; All versions of PAN-OS 8.0.

Affected products

Vendor Palo Alto Networks Product Pan-OS Default
n/a
- Version
  7.1
  Status
  affected
  Constraints
  <7.1.26
- Version
  8.0.*
  Status
  affected
  Constraints
  -
- Version
  8.1
  Status
  affected
  Constraints
  <8.1.13
- Version
  9.0
  Status
  affected
  Constraints
  <9.0.6
- Version
  9.1
  Status
  affected
  Constraints
  <9.1.1

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Palo Alto Networks

Pan-OS

n/a

Version	Status	Constraints
7.1	affected	<7.1.26
8.0.*	affected	-
8.1	affected	<8.1.13
9.0	affected	<9.0.6
9.1	affected	<9.1.1

Remediation

Vendor solution

This issue is fixed in PAN-OS 7.1.26, PAN-OS 8.1.13, PAN-OS 9.0.6, PAN-OS 9.1.1, and all later PAN-OS versions.

PAN-OS 8.0 is now end-of-life as of October 31, 2019, and is no longer covered by our Product Security Assurance policies.

Metrics

0.89% 0.00892

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00892

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (12 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.89% (0.00892)	57.97th	v5 (v2026.06.15)
Sep 20, 2026	0.89% (0.00892)	57.89th	v5 (v2026.06.15)
Jul 20, 2024	0.10% (0.00104)	43.04th	v3 (v2023.03.01)
Jun 28, 2024	0.10% (0.00104)	42.91th	v3 (v2023.03.01)
Mar 7, 2023	0.10% (0.00104)	40.90th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00885)	27.89th	v2 (v2022.01.01)
Apr 1, 2022	0.89% (0.00885)	24.24th	v2 (v2022.01.01)
Feb 4, 2022	9.03% (0.09029)	86.86th	v2 (v2022.01.01)
Feb 3, 2022	1.84% (0.01840)	47.83th	v1
Jan 6, 2022	1.84% (0.01840)	47.32th	v1
Jan 5, 2022	0.42% (0.00416)	26.65th	v5 (v2026.06.15)
Apr 14, 2021	0.42% (0.00416)	0.00th	v1