How severe is CVE-2020-13101?

CVE-2020-13101 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2020-13101 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-13101?

CVE-2020-13101 affects Oasis-open Oasis Digital Signature Services. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-13101?

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-2020-13101 published?

CVE-2020-13101 was published on 2020-08-24 and last updated on 2026-06-17.

CVE-2020-13101

CVE-2020-13101 is a high-severity vulnerability in Oasis-open Oasis Digital Signature Services with a CVSS 3.x base score of 7.5. 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-347.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-347
Affected product: Oasis-open Oasis Digital Signature Services
Published: 2020-08-24
Last modified: 2026-06-17

Description

In OASIS Digital Signature Services (DSS) 1.0, an attacker can control the validation outcome (i.e., trigger either a valid or invalid outcome for a valid or invalid signature) via a crafted XML signature, when the InlineXML option is used. This defeats the expectation of non-repudiation.

Frequently asked questions

What is CVE-2020-13101?: In OASIS Digital Signature Services (DSS) 1.0, an attacker can control the validation outcome (i.e., trigger either a valid or invalid outcome for a valid or invalid signature) via a crafted XML signature, when the InlineXML option is used. This defeats the expectation of non-repudiation.
How severe is CVE-2020-13101?: CVE-2020-13101 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2020-13101 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-13101?: CVE-2020-13101 affects Oasis-open Oasis Digital Signature Services. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-13101?: 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-2020-13101 published?: CVE-2020-13101 was published on 2020-08-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:oasis-open:oasis_digital_signature_services:1.0:*:*:*:*:*:*:*

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