CVE-2025-31435Network attack vector

Stored XSS via missing nonce validation

Published Mar 28, 2025 · Updated Apr 28, 2026

Cross-site request forgery in Efficient Scripts Microblog Poster 2.1.6 and earlier allows remote attackers to inject stored scripts. The affected settings-update function accepts a forged administrative request because its nonce validation is missing or incorrect. Exploitation requires tricking a site administrator into opening a malicious link, after which the stored script runs for visitors to the compromised site.

CVSS severity7.1
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in Efficient Scripts Microblog Poster 2.1.6 and earlier allows remote attackers to inject stored scripts. The affected settings-update function accepts a forged administrative request because its nonce validation is missing or incorrect. Exploitation requires tricking a site administrator into opening a malicious link, after which the stored script runs for visitors to the compromised site.

The record

CVE
CVE-2025-31435
Published
Mar 28, 2025
Updated
Apr 28, 2026
Vendor
Efficient Scripts
Product
Microblog Poster
Classifications
CWE-352, CAPEC-592, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 28, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.1.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Efficient Scripts · Microblog Posterversion=0 <=2.1.6

Published CVSS scores

7.1PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CAPEC-592Stored XSS
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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