How severe is CVE-2020-9734?

CVE-2020-9734 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-9734 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9734?

CVE-2020-9734 affects Adobe Experience Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-9734?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-9734 published?

CVE-2020-9734 was published on 2020-09-10 and last updated on 2026-06-17.

CVE-2020-9734

CVE-2020-9734 is a critical-severity vulnerability in Adobe Experience Manager with a CVSS 3.x base score of 9.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
CVSS v2: 3.5
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Adobe Experience Manager
Published: 2020-09-10
Last modified: 2026-06-17

Description

The AEM Forms add-on for versions 6.5.5.0 (and below) and 6.4.8.1 (and below) is affected by a stored XSS vulnerability that allows users with 'Author' privileges to store malicious scripts in fields associated with the Forms component. These scripts may be executed in a victim’s browser when they open the page containing the vulnerable field.

Frequently asked questions

What is CVE-2020-9734?: The AEM Forms add-on for versions 6.5.5.0 (and below) and 6.4.8.1 (and below) is affected by a stored XSS vulnerability that allows users with 'Author' privileges to store malicious scripts in fields associated with the Forms component. These scripts may be executed in a victim’s browser when they open the page containing the vulnerable field.
How severe is CVE-2020-9734?: CVE-2020-9734 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-9734 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9734?: CVE-2020-9734 affects Adobe Experience Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-9734?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-9734 published?: CVE-2020-9734 was published on 2020-09-10 and last updated on 2026-06-17.

References

https://helpx.adobe.com/security/products/experience-manager/apsb20-56.html

Affected products (1)

cpe:2.3:a:adobe:experience_manager:*:*:*:*:*:*:*:*

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