Quttera ThreatSign <= 4.1.0.48 - Unauthenticated Stored Cross-Site Scripting via User-Agent Header
- Exploited
- No known exploitation
- Fix
- No fix listed
- Who is exposed
- Not reported
- Published
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 29/100 · provisional
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
The Quttera ThreatSign web malware scanner plugin for WordPress, in all versions up to and including 4.1.0.48, can be abused by an attacker to inject malicious scripts into pages that run when an administrator opens the affected page. The attacker can reach this remotely, without logging in, and the flaw is not triggered by any user action.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
Read the original description
The Quttera ThreatSign – Web Malware Scanner for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'HTTP_USER_AGENT' parameter in all versions up to, and including, 4.1.0.48 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever an administrator accesses an injected page.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure17/25No login or user action needed per the CVSS vector, reachable over the network without a login · Unknown: No advisory context yet
- Reach?/20Unknown. No tracked technology or package matched
- Severity7.2/10CVSS 7.2
- No patch5/5No patch listed yet
What would change the score
- Would score about 74 if added to CISA KEV
- Would score about 69 if CISA's SSVC rates exploitation active
- Would score about 34 if advisories confirm default setups are exposed
Timeline
- CVE published
- First seen by cve.now
Affected versions
- quttera Quttera ThreatSign – Web Malware Scanner for WordPress
through 4.1.0.48
Evidence 6
- Link
- Link
- Link
- Link
- Link
- Link
Corrections
None so far.
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Questions about CVE-2026-115548
Is CVE-2026-115548 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
Which versions are affected by CVE-2026-115548?
Quttera ThreatSign – Web Malware Scanner for WordPress: through 4.1.0.48.Source: cve.now feed data