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CVE-2020-7731

25
FAUCET Score

CVE-2020-7731 is a high-severity nil-pointer dereference vulnerability affecting all versions prior to 0.7.0 of the gosaml2 package. An unauthenticated attacker can trigger a denial-of-service by sending a specially crafted, malformed XML signature. While the CVSS score is 7.5, indicating a significant impact on availability, there is currently no evidence of active exploitation, public exploit code, or community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:gosaml2_project:gosaml2:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.66%
Probability of exploitation in next 30 days
EPSS Percentile
74.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0166 is in the 57th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/russellhaering/gosaml2Fixed in: 0.7.0
gopatch availablevia ghsa
Product: github.com/russellhaering/goxmldsigFixed in: 1.1.1

Vendor Advisories (1)

goGHSA-prjq-f4q3-fvfrhigh

github.com/russellhaering/gosaml2 is vulnerable to NULL Pointer Dereference

Nov 15, 2022

References

github.com / russellhaering/gosaml2/issues/59
PatchThird Party Advisory
github.com / russellhaering/gosaml2/releases/tag/v0.7.0
snyk.io / vuln/SNYK-GOLANG-GITHUBCOMRUSSELLHAERINGGOSAML2-608302
Third Party Advisory