CVE-2023-1256 — The listed versions of AVEVA Plant SCADA and AVEVA Telemetry Server are vulnerab

The listed versions of AVEVA Plant SCADA and AVEVA Telemetry Server are vulnerable to an improper authorization exploit which could allow an unauthenticated user to remotely read data, cause denial of service, and tamper with alarm states.

01What is this vulnerability?

The listed versions of AVEVA Plant SCADA and AVEVA Telemetry Server are vulnerable to an improper authorization exploit which could allow an unauthenticated user to remotely read data, cause denial of service, and tamper with alarm states.

02Affected products

Vendor	Product	Versions
AVEVA	AVEVA Plant SCADA	2023 Update 10
AVEVA	AVEVA Plant SCADA	2020R2 Update 10
AVEVA	AVEVA Telemetry Server	2020 R2 SP1

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-03-16T18:33:52.907Z
• Last modified: 2025-01-16T21:42:14.018Z

09References

• www.cisa.gov — https://www.cisa.gov/news-events/ics-advisories/icsa-23-073-04