How severe is CVE-2021-43764?

CVE-2021-43764 has a CVSS 3.x base score of 8.0, rated high 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-2021-43764 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43764?

CVE-2021-43764 primarily affects Adobe Experience Manager. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-43764?

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

When was CVE-2021-43764 published?

CVE-2021-43764 was published on 2022-01-13 and last updated on 2026-06-17.

CVE-2021-43764

CVE-2021-43764 is a high-severity vulnerability in Adobe Experience Manager with a CVSS 3.x base score of 8.0. 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: High (CVSS 3.x base score 8.0)
CVSS v2: 3.5
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Adobe Experience Manager
Published: 2022-01-13
Last modified: 2026-06-17

Description

AEM's Cloud Service offering, as well as version 6.5.10.0 (and below) are affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by an attacker to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim’s browser when they browse to the page containing the vulnerable field.

Frequently asked questions

What is CVE-2021-43764?: AEM's Cloud Service offering, as well as version 6.5.10.0 (and below) are affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by an attacker to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim’s browser when they browse to the page containing the vulnerable field.
How severe is CVE-2021-43764?: CVE-2021-43764 has a CVSS 3.x base score of 8.0, rated high 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-2021-43764 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43764?: CVE-2021-43764 primarily affects Adobe Experience Manager. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-43764?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-43764 published?: CVE-2021-43764 was published on 2022-01-13 and last updated on 2026-06-17.

References

https://helpx.adobe.com/security/products/experience-manager/apsb21-103.html

Affected products (2)

cpe:2.3:a:adobe:experience_manager:*:*:*:*:*:*:*:*
cpe:2.3:a:adobe:experience_manager_cloud_service:-:*:*:*:*:*:*:*

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