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CVE-2026-77131

Cleartext Transmission of Sensitive Information in extension "SYSSY - TYPO3 Monitoring & Security Checks" (syssy)

MEDIUM
5.3
CVSS Score
Published: August 25, 2026 at 09:00 AM UTC
Updated: August 26, 2026 at 05:31 PM UTC
1 product affected across 1 vendorSyssy

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

When OpenSSL is unavailable on the server, the extension transmits TYPO3 system information in cleartext instead of encrypting it. Exploitation requires the attacker to already be in control of the SYSSY project's API key.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Syssy· TYPO3composer
60%
v < 3.0.6
Affected range stops below 3.0.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://typo3.org/security/advisory/typo3-ext-sa-2026-015

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMTYPO3
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-319

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