CVE-2025-5886VulnerabilityPublished 9 Jun 2025

CVE-2025-5886: Emlog · Cross Site Scripting

Affects EmlogSource CVE Database V5

Not known to be exploited · CVSS 5.1 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 4.0 base score

5.1Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 34% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: Low
User Interaction: Passive
Vulnerable system confidentiality: None
Vulnerable system integrity: Low
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Threat metrics

Exploit Maturity: POC

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: Low: The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction: Passive: Successful exploitation of this vulnerability requires limited interaction by the targeted user with the vulnerable system and the attacker’s payload. These interactions would be considered involuntary and do not require that the user actively subvert protections built into the vulnerable system.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 9 Jun 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
GitHubemlog/emlog`pkg:github/emlog/emlog`Other threats	Affected =2.5.0 =2.5.1 =2.5.2 =2.5.3 =2.5.4 =2.5.5 =2.5.6 =2.5.7	Fixed in–

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AI-suggested

1. Immediate mitigation should include sanitizing and validating all user inputs, especially the 'active_post' parameter in /admin/article.php, to prevent script injection. 2. If a vendor patch becomes available, apply it promptly to eliminate the vulnerability. 3. Implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts on the affected web pages. 4. Restrict access to the admin interface by IP whitelisting or VPN to reduce exposure. 5. Educate administrators and users about phishing risks and the dangers of clicking unknown links. 6. Monitor web server logs for suspicious requests targeting the 'active_post' parameter to detect potential exploitation attempts. 7. Consider deploying Web Application Firewalls (WAFs) with rules to detect and block XSS payloads targeting Emlog. 8. Regularly back up website content and configurations to enable quick recovery in case of defacement or compromise.

Description

A vulnerability was found in Emlog up to 2.5.7 and classified as problematic. This issue affects some unknown processing of the file /admin/article.php. The manipulation of the argument active_post leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Impact

For European organizations using Emlog for their blogging or content management needs, this vulnerability poses a moderate risk. Successful exploitation could lead to session hijacking, unauthorized actions within the admin panel, or defacement of web content. This can damage organizational reputation, lead to data leakage, or enable further attacks such as privilege escalation or malware deployment. Given that Emlog is typically used by smaller websites, the impact on large enterprises may be limited unless they rely on this platform for critical communications. However, public sector websites, educational institutions, or SMEs in Europe using Emlog could face service disruption or data integrity issues. The requirement for user interaction means that phishing or social engineering could be used to trigger the exploit, increasing the risk in environments with less cybersecurity awareness. Since no widespread exploitation is reported yet, the threat is currently moderate but could escalate if exploit code becomes widely used.

Summary

CVE-2025-5886 is a cross-site scripting (XSS) vulnerability identified in Emlog versions up to 2.5.7, specifically affecting the /admin/article.php file. The vulnerability arises from improper handling of the 'active_post' parameter, which can be manipulated by an attacker to inject malicious scripts. This flaw allows an attacker to execute arbitrary JavaScript code in the context of the victim's browser when they access a crafted URL or page. The vulnerability is remotely exploitable without requiring authentication, but it does require user interaction, such as an administrator or user visiting a maliciously crafted link or page. The CVSS 4.0 base score is 5.1, indicating a medium severity level. The vector details indicate that the attack can be performed over the network (AV:N), with low attack complexity (AC:L), no privileges required (PR:L, which means low privileges are needed), and user interaction is necessary (UI:P). The impact primarily affects the integrity and confidentiality of the user's session or data, as the attacker can steal cookies, perform actions on behalf of the user, or deface the admin interface. No known exploits are currently observed in the wild, but public disclosure of the exploit code increases the risk of exploitation. The vulnerability is limited to the Emlog blogging platform, which is a niche product used for content management and blogging, often by small to medium websites. The lack of a vendor patch link suggests that a fix may not yet be available or publicly announced, increasing the urgency for mitigation.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 11 Jul 2025, 02:01 UTC

Technical details

References

Community reviews

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