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CVE-2023-33964

23
FAUCET Score

CVE-2023-33964 is a processing vulnerability affecting MultiversX mx-chain-go versions prior to 1.4.16, where the metachain transaction processor incorrectly handles invalid cross-shard transactions with the wrong username. This could cause the metachain to cease notarizing blocks from shard chains, requiring a patched binary for recovery. Rated 7.5 HIGH (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N), it is a network-exploitable issue with low attack complexity, leading to high integrity impact (service disruption) without confidentiality or availability impact. There is currently no known active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.4.16CPE matchmatch criteria
cpe:2.3:a:multiversx:mx-chain-go:*:*:*:*:*:go:*:*

CVSS Data

CVSS version used by this source: 3.1

8.6HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
4.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.56%
Probability of exploitation in next 30 days
EPSS Percentile
43.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0056 is in the 21st 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 (2)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/multiversx/mx-chain-goFixed in: 1.4.16

Vendor Advisories (1)

goGHSA-7xpv-4pm9-xch2high

mx-chain-go does not treat invalid transaction with wrong username correctly

Jun 2, 2023

References

github.com / multiversx/mx-chain-go/commit/97295471465f4b5f79e51b32f8b7111f8d921606
Patch
github.com / multiversx/mx-chain-go/security/advisories/GHSA-7xpv-4pm9-xch2
Vendor Advisory