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CVE-2021-32738

21
FAUCET Score

CVE-2021-32738 describes a vulnerability in js-stellar-sdk versions prior to 8.2.3, where the Utils.readChallengeTx function failed to verify that the serverAccountID had signed the challenge transaction as documented. This could allow an attacker to bypass a critical security check in applications using SEP-10 Stellar Web Authentication. The vulnerability has a CVSS score of 6.5 (Medium), indicating it can be exploited remotely with low complexity by an authenticated user, potentially leading to high integrity impact without affecting confidentiality or availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 8.2.3CPE matchmatch criteria
cpe:2.3:a:stellar:js-stellar-sdk:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.51%
Probability of exploitation in next 30 days
EPSS Percentile
40.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0051 is in the 51st percentile among its peer group of 21,977 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (1)

npmpatch availablevia ghsa
Product: stellar-sdkFixed in: 8.2.3

Vendor Advisories (1)

npmGHSA-6cgh-hjpw-q3gqmedium

Utils.readChallengeTx does not verify the server account signature

Jul 2, 2021

References

github.com / stellar/js-stellar-sdk/releases/tag/v8.2.3
Release NotesThird Party Advisory
github.com / stellar/js-stellar-sdk/security/advisories/GHSA-6cgh-hjpw-q3gq
Third Party Advisory