Signed-data spoofing via mutable packet stream
Published May 19, 2025 · Updated May 20, 2025
Improper signature verification in OpenPGP.js 5.0.1 through 5.11.2 and 6.0.0-alpha.0 through 6.1.0 allows attackers to spoof signed data. Message.verify drains pending packets into the same packet list after selecting the literal data to hash, so a later unwrapCompressed call returns attacker-appended data instead. Exploitation requires a valid signature and its original plaintext; affected inline or signed-and-encrypted flows then report that signature as valid for substituted content.
Summary
What happened
Improper signature verification in OpenPGP.js 5.0.1 through 5.11.2 and 6.0.0-alpha.0 through 6.1.0 allows attackers to spoof signed data. Message.verify drains pending packets into the same packet list after selecting the literal data to hash, so a later unwrapCompressed call returns attacker-appended data instead. Exploitation requires a valid signature and its original plaintext; affected inline or signed-and-encrypted flows then report that signature as valid for substituted content.
The record
- CVE
- CVE-2025-47934
- Published
- May 19, 2025
- Updated
- May 20, 2025
- Vendor
- OpenPGP.js
- Product
- OpenPGP.js
- Classifications
- CWE-347, T1036
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 19, 2025CVE publishedPublication date reported by the CVE source.
- May 20, 2025Record 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.
- Affected versionversion=>= 5.0.1, < 5.11.3
- Affected versionversion=>= 6.0.0-alpha.0, < 6.1.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- OpenPGP.js signature-spoofing proof of conceptfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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