PHPEMS Coupon race condition

published 2025-12-30 10 mo ago modified 2026-10-13 27 d ago also EUVD-2025-205703

cvss: 3.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 14%
public exploits: 0; none known

A vulnerability was detected in PHPEMS up to 11.0. The impacted element is an unknown function of the component Coupon Handler. Performing a manipulation results in race condition. The attack can be initiated remotely. The complexity of an attack is rather high. The exploitability is regarded as difficult. The exploit is now public and may be used.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 10 mo ago (2025-12-30)

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

byebydoggy.github.io https://byebydoggy.github.io/post/2025/1229-phpems-coupon-recharge-race-condition-poc/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	2.3	CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
CNA	3.1	3.1	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
CNA	3.0	3.1	CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R
CNA	2.0	2.1	AV:N/AC:H/Au:S/C:N/I:P/A:N/E:POC/RL:ND/RC:UR
CNA	4.0	1.3	CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	3.1	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
CNA	2.0	2.1	AV:N/AC:H/Au:S/C:N/I:P/A:N

Affected products

n/a PHPEMS

Classification

Weakness

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization

References

byebydoggy.github.io /post/2025/1229-phpems-coupon-recharge-race-condition-poc/
exploit, mitigation, third-party-advisory
vuldb.com /?id.338632
vdb-entry, third-party-advisory
vuldb.com /?ctiid.338632
signature, permissions-required, vdb-entry
vuldb.com /?submit.725661
third-party-advisory, vdb-entry

Sources

CVE List CVE-2025-15242
NVD CVE-2025-15242

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