How severe is CVE-2021-20559?

CVE-2021-20559 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-20559 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-20559?

CVE-2021-20559 primarily affects Ibm Control Desk. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-20559?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-20559 published?

CVE-2021-20559 was published on 2021-05-10 and last updated on 2026-06-17.

CVE-2021-20559

CVE-2021-20559 is a medium-severity vulnerability in Ibm Control Desk with a CVSS 3.x base score of 5.4. 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: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Ibm Control Desk
Published: 2021-05-10
Last modified: 2026-06-17

Description

IBM Control Desk 7.6.1.2 and 7.6.1.3 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. IBM X-Force ID: 199228.

Frequently asked questions

What is CVE-2021-20559?: IBM Control Desk 7.6.1.2 and 7.6.1.3 is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session. IBM X-Force ID: 199228.
How severe is CVE-2021-20559?: CVE-2021-20559 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-20559 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-20559?: CVE-2021-20559 primarily affects Ibm Control Desk. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-20559?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-20559 published?: CVE-2021-20559 was published on 2021-05-10 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:ibm:control_desk:7.6.1.2:*:*:*:*:*:*:*
cpe:2.3:a:ibm:control_desk:7.6.1.3:*:*:*:*:*:*:*

More vulnerabilities in Ibm Control Desk

CVE-2020-4409 — High (CVSS 8.2): IBM Maximo Asset Management 7.6.0 and 7.6.1 could allow a remote attacker to conduct phishing attacks, using a…
CVE-2019-4364 — High (CVSS 8.0): IBM Maximo Asset Management 7.6 is vulnerable to CSV injection, which could allow a remote authenticated attacker to…
CVE-2018-2028 — Medium (CVSS 6.5): IBM Maximo Asset Management 7.6 could allow a an authenticated user to replace a target page with a phishing site which…
CVE-2019-4644 — Medium (CVSS 6.1): IBM Maximo Asset Management 7.6 is vulnerable to cross-site scripting. This vulnerability allows users to embed…
CVE-2019-4749 — Medium (CVSS 5.4): IBM Maximo Asset Management 7.6 is vulnerable to cross-site scripting. This vulnerability allows users to embed…
CVE-2019-4446 — Medium (CVSS 5.4): IBM Maximo Asset Management 7.6 could allow an authenticated user perform actions they are not authorized to by…

All CVEs affecting Ibm Control Desk →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →