Pomelo allows external control of critical state data

published 2019-11-13 6 y ago modified 2026-06-17 4 mo ago also GHSA-4x6v-rwh4-55jw , EUVD-2019-0778

cvss: 5.3; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits: 0; none known

Pomelo v2.2.5 allows external control of critical state data. A malicious user input can corrupt arbitrary methods and attributes in template/game-server/app/servers/connector/handler/entryHandler.js because certain internal attributes can be overwritten via a conflicting name. Hence, a malicious attacker can manipulate internal attributes by adding additional attributes to user input.

Patch / fix

fixed in 1

npm pomelo 2.2.7

Exploit prediction

1.16% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/cl0udz/vulnerabilities/tree/master/pomelo-critical-state-manipulation referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P
GitHub	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected packages

ecosystem	package	affected	fixed in
npm	pomelo	<2.2.7	2.2.7

Classification

Weakness

CWE-668 Exposure of Resource to Wrong Sphere

References

github.com /cl0udz/vulnerabilities/tree/master/pomelo-critical-state-manipulation
web, exploit, third-party-advisory
github.com /NetEase/pomelo/issues/1149
web, issue-tracking, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2019-18954
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary