EUVD-2026-83993
GHSA-mwgw-rr28-m856
Severity by source
AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L
Unauthenticated remote POST needs no victim action (UI:N) but requires a crafted PHP gadget chain (AC:H); impact stays within the app (S:U) and is limited to variable injection (C/I/A:L).
Primary rating from Vendor (mitre).
CVSS VectorVendor: mitre
Lifecycle Timeline
4DescriptionCVE.org
Deserialization of Untrusted Data of the __post_data parameter in cn_parse_url() in CuteNews v.2.1.2 allows a remote attacker to inject arbitrary values into internal request variables (including __referer) via a crafted base64-encoded serialized PHP payload submitted as a POST parameter.
AnalysisAI
PHP object injection in CuteNews 2.1.2 allows remote attackers to overwrite internal request variables - including __referer - by submitting a base64-encoded serialized PHP payload through the __post_data parameter handled by cn_parse_url(). The flaw is network-reachable and unauthenticated (PR:N) but carries high attack complexity (AC:H) because any impact beyond variable overwrite depends on a usable PHP gadget chain existing in the codebase, and all three impact metrics are rated Low. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the target to be running CuteNews 2.1.2 and reaching the cn_parse_url() code path that unserializes the attacker-controlled __post_data POST parameter; the attacker must supply a valid base64-encoded serialized PHP object. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The supplied CVSS 3.1 vector (AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L, base 5.8) describes a network-reachable, unauthenticated but high-complexity flaw with only low confidentiality, integrity, and availability impact - consistent with the description, which limits the outcome to injecting arbitrary values into internal request variables (e.g. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch identified at time of analysis, so remediation must be compensating-control driven until upstream fixes are published. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-502 – Deserialization of Untrusted Data
View allSame technique Deserialization
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External POC / Exploit Code
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