CVE-2021-3645: merge_project merge Prototype Pollution
CVSS: 9.8v3.1CriticalModified
AliasesGHSA-cqqh-49mx-fq63
Published 10-09-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-3645 is a critical (CVSS 9.8) Prototype Pollution vulnerability in merge_project merge. EPSS estimates a 1.43% chance of exploitation in the next 30 days, higher than 72.6% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
1.43%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 10-09-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
merge is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
CVSS metrics
5 scores · 3 sources · 3 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- OSV · NpmEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Medium 6.8Preferred score · CVE.org (CNA)
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:NSourcesAll 2 agree
- NVDNIST6.8MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
1.43%
Chance of exploitation in the next 30 days
Percentile
73%
Versus all other CVEs
30-day change
0.00 pp
From 1.43% on 20-09-2026
20-09-202620-10-2026
EPSS score1.43%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (huntr.dev)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
@viking041 product
- merge< 1.0.2
Merge_project1 product
- merge< 1.0.2
Viking041 product
- viking04/merge≥ unspecified, < 1.0.2
3 vendors · 3 products
References
4 links- huntr.dev/bounties/ef387a9e-ca3c-4c21-80e3-d34a6a896262X Refsource CONFIRMWEBExploitThird Party Advisory
- github.com/viking04/merge/commit/baba40332080b38b33840d2614df6d4142dedaf6X Refsource MISCWEBPatchThird Party Advisory
- github.com/viking04/mergePACKAGE