How severe is CVE-2020-8243?

CVE-2020-8243 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-8243 being actively exploited?

Yes. CVE-2020-8243 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2020-8243?

CVE-2020-8243 primarily affects Ivanti Connect Secure. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-8243?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2020-8243 have an EU (EUVD) identifier?

Yes. CVE-2020-8243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-29114. It is also flagged as exploited in the EUVD (since 2021-11-03).

When was CVE-2020-8243 published?

CVE-2020-8243 was published on 2020-09-30 and last updated on 2026-06-17.

CVE-2020-8243

CVE-2020-8243 is a high-severity vulnerability in Ivanti Connect Secure with a CVSS 3.x base score of 7.2. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2021-11-03). The underlying weakness is classified as CWE-94.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.5
EPSS exploit prediction: 91% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2021-11-03)
EU (EUVD) id: EUVD-2020-29114
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2021-11-03)
Weakness: CWE-94
Affected product: Ivanti Connect Secure
Published: 2020-09-30
Last modified: 2026-06-17

Description

A vulnerability in the Pulse Connect Secure < 9.1R8.2 admin web interface could allow an authenticated attacker to upload custom template to perform an arbitrary code execution.

Frequently asked questions

What is CVE-2020-8243?: A vulnerability in the Pulse Connect Secure < 9.1R8.2 admin web interface could allow an authenticated attacker to upload custom template to perform an arbitrary code execution.
How severe is CVE-2020-8243?: CVE-2020-8243 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-8243 being actively exploited?: Yes. CVE-2020-8243 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2020-8243?: CVE-2020-8243 primarily affects Ivanti Connect Secure. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-8243?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2020-8243 have an EU (EUVD) identifier?: Yes. CVE-2020-8243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-29114. It is also flagged as exploited in the EUVD (since 2021-11-03).
When was CVE-2020-8243 published?: CVE-2020-8243 was published on 2020-09-30 and last updated on 2026-06-17.

References

Affected products (28)

cpe:2.3:a:ivanti:connect_secure:*:*:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:-:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r1:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r2:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r3:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r4:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r4.1:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r4.2:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r4.3:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r5:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r6:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r7:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r8:*:*:*:*:*:*
cpe:2.3:a:ivanti:connect_secure:9.1:r8.1:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:*:*:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:9.1:-:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:9.1:r1:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:9.1:r2:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:9.1:r3:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:9.1:r4:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:9.1:r4.1:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:9.1:r4.2:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:9.1:r4.3:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:9.1:r5:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:9.1:r6:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:9.1:r7:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:9.1:r8:*:*:*:*:*:*
cpe:2.3:a:ivanti:policy_secure:9.1:r8.1:*:*:*:*:*:*

More vulnerabilities in Ivanti Connect Secure

CVE-2021-22893 — Critical (CVSS 10.0): Pulse Connect Secure 9.0R3/9.1R1 and higher is vulnerable to an authentication bypass vulnerability exposed by the…
CVE-2019-11510 — Critical (CVSS 10.0): In Pulse Secure Pulse Connect Secure (PCS) 8.2 before 8.2R12.1, 8.3 before 8.3R7.1, and 9.0 before 9.0R3.4, an…
CVE-2016-4787 — Critical (CVSS 10.0): Pulse Connect Secure (PCS) 8.2 before 8.2r1, 8.1 before 8.1r2, 8.0 before 8.0r10, and 7.4 before 7.4r13.4 allow remote…
CVE-2025-22467 — Critical (CVSS 9.9): A stack-based buffer overflow in Ivanti Connect Secure before version 22.7R2.6 allows a remote authenticated attacker…
CVE-2024-21894 — Critical (CVSS 9.8): A heap overflow vulnerability in IPSec component of Ivanti Connect Secure (9.x, 22.x) and Ivanti Policy Secure allows…
CVE-2018-20813 — Critical (CVSS 9.8): An input validation issue has been found with login_meeting.cgi in Pulse Secure Pulse Connect Secure 8.3RX before 8.3R2.

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